19957600

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1$

素因数の和:153

約数の個数: 144

約数和(自身を含む): 55777680

約数和(自身を除く): 35820080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 25, 26, 32, 38, 40, 50, 52, 65, 76, 80, 95, 100, 101, 104, 130, 152, 160, 190, 200, 202, 208, 247, 260, 304, 325, 380, 400, 404, 416, 475, 494, 505, 520, 608, 650, 760, 800, 808, 950, 988, 1010, 1040, 1235, 1300, 1313, 1520, 1616, 1900, 1919, 1976, 2020, 2080, 2470, 2525, 2600, 2626, 3040, 3232, 3800, 3838, 3952, 4040, 4940, 5050, 5200, 5252, 6175, 6565, 7600, 7676, 7904, 8080, 9595, 9880, 10100, 10400, 10504, 12350, 13130, 15200, 15352, 16160, 19190, 19760, 20200, 21008, 24700, 24947, 26260, 30704, 32825, 38380, 39520, 40400, 42016, 47975, 49400, 49894, 52520, 61408, 65650, 76760, 80800, 95950, 98800, 99788, 105040, 124735, 131300, 153520, 191900, 197600, 199576, 210080, 249470, 262600, 307040, 383800, 399152, 498940, 525200, 623675, 767600, 798304, 997880, 1050400, 1247350, 1535200, 1995760, 2494700, 3991520, 4989400, 9978800, 19957600]

約数ペア:

[(1, 19957600), (2, 9978800), (4, 4989400), (5, 3991520), (8, 2494700), (10, 1995760), (13, 1535200), (16, 1247350), (19, 1050400), (20, 997880), (25, 798304), (26, 767600), (32, 623675), (38, 525200), (40, 498940), (50, 399152), (52, 383800), (65, 307040), (76, 262600), (80, 249470), (95, 210080), (100, 199576), (101, 197600), (104, 191900), (130, 153520), (152, 131300), (160, 124735), (190, 105040), (200, 99788), (202, 98800), (208, 95950), (247, 80800), (260, 76760), (304, 65650), (325, 61408), (380, 52520), (400, 49894), (404, 49400), (416, 47975), (475, 42016), (494, 40400), (505, 39520), (520, 38380), (608, 32825), (650, 30704), (760, 26260), (800, 24947), (808, 24700), (950, 21008), (988, 20200), (1010, 19760), (1040, 19190), (1235, 16160), (1300, 15352), (1313, 15200), (1520, 13130), (1616, 12350), (1900, 10504), (1919, 10400), (1976, 10100), (2020, 9880), (2080, 9595), (2470, 8080), (2525, 7904), (2600, 7676), (2626, 7600), (3040, 6565), (3232, 6175), (3800, 5252), (3838, 5200), (3952, 5050), (4040, 4940)]