1621900000

素因数分解:

$2^5\times 5^5\times 7^2\times {\mathrm{331}}^1$

素因数の和:380

約数の個数: 216

約数和(自身を含む): 4656780072

約数和(自身を除く): 3034880072

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 125, 140, 160, 175, 196, 200, 224, 245, 250, 280, 331, 350, 392, 400, 490, 500, 560, 625, 662, 700, 784, 800, 875, 980, 1000, 1120, 1225, 1250, 1324, 1400, 1568, 1655, 1750, 1960, 2000, 2317, 2450, 2500, 2648, 2800, 3125, 3310, 3500, 3920, 4000, 4375, 4634, 4900, 5000, 5296, 5600, 6125, 6250, 6620, 7000, 7840, 8275, 8750, 9268, 9800, 10000, 10592, 11585, 12250, 12500, 13240, 14000, 16219, 16550, 17500, 18536, 19600, 20000, 21875, 23170, 24500, 25000, 26480, 28000, 30625, 32438, 33100, 35000, 37072, 39200, 41375, 43750, 46340, 49000, 50000, 52960, 57925, 61250, 64876, 66200, 70000, 74144, 81095, 82750, 87500, 92680, 98000, 100000, 115850, 122500, 129752, 132400, 140000, 153125, 162190, 165500, 175000, 185360, 196000, 206875, 231700, 245000, 259504, 264800, 289625, 306250, 324380, 331000, 350000, 370720, 405475, 413750, 463400, 490000, 519008, 579250, 612500, 648760, 662000, 700000, 810950, 827500, 926800, 980000, 1034375, 1158500, 1225000, 1297520, 1324000, 1448125, 1621900, 1655000, 1853600, 2027375, 2068750, 2317000, 2450000, 2595040, 2896250, 3243800, 3310000, 4054750, 4137500, 4634000, 4900000, 5792500, 6487600, 6620000, 7240625, 8109500, 8275000, 9268000, 10136875, 11585000, 12975200, 14481250, 16219000, 16550000, 20273750, 23170000, 28962500, 32438000, 33100000, 40547500, 46340000, 50684375, 57925000, 64876000, 81095000, 101368750, 115850000, 162190000, 202737500, 231700000, 324380000, 405475000, 810950000, 1621900000]

約数ペア:

[(1, 1621900000), (2, 810950000), (4, 405475000), (5, 324380000), (7, 231700000), (8, 202737500), (10, 162190000), (14, 115850000), (16, 101368750), (20, 81095000), (25, 64876000), (28, 57925000), (32, 50684375), (35, 46340000), (40, 40547500), (49, 33100000), (50, 32438000), (56, 28962500), (70, 23170000), (80, 20273750), (98, 16550000), (100, 16219000), (112, 14481250), (125, 12975200), (140, 11585000), (160, 10136875), (175, 9268000), (196, 8275000), (200, 8109500), (224, 7240625), (245, 6620000), (250, 6487600), (280, 5792500), (331, 4900000), (350, 4634000), (392, 4137500), (400, 4054750), (490, 3310000), (500, 3243800), (560, 2896250), (625, 2595040), (662, 2450000), (700, 2317000), (784, 2068750), (800, 2027375), (875, 1853600), (980, 1655000), (1000, 1621900), (1120, 1448125), (1225, 1324000), (1250, 1297520), (1324, 1225000), (1400, 1158500), (1568, 1034375), (1655, 980000), (1750, 926800), (1960, 827500), (2000, 810950), (2317, 700000), (2450, 662000), (2500, 648760), (2648, 612500), (2800, 579250), (3125, 519008), (3310, 490000), (3500, 463400), (3920, 413750), (4000, 405475), (4375, 370720), (4634, 350000), (4900, 331000), (5000, 324380), (5296, 306250), (5600, 289625), (6125, 264800), (6250, 259504), (6620, 245000), (7000, 231700), (7840, 206875), (8275, 196000), (8750, 185360), (9268, 175000), (9800, 165500), (10000, 162190), (10592, 153125), (11585, 140000), (12250, 132400), (12500, 129752), (13240, 122500), (14000, 115850), (16219, 100000), (16550, 98000), (17500, 92680), (18536, 87500), (19600, 82750), (20000, 81095), (21875, 74144), (23170, 70000), (24500, 66200), (25000, 64876), (26480, 61250), (28000, 57925), (30625, 52960), (32438, 50000), (33100, 49000), (35000, 46340), (37072, 43750), (39200, 41375)]