21612500

素因数分解:

$2^2\times 5^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1$

素因数の和:68

約数の個数: 144

約数和(自身を含む): 61246080

約数和(自身を除く): 39633580

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 19, 20, 25, 26, 28, 35, 38, 50, 52, 65, 70, 76, 91, 95, 100, 125, 130, 133, 140, 175, 182, 190, 247, 250, 260, 266, 325, 350, 364, 380, 455, 475, 494, 500, 532, 625, 650, 665, 700, 875, 910, 950, 988, 1235, 1250, 1300, 1330, 1625, 1729, 1750, 1820, 1900, 2275, 2375, 2470, 2500, 2660, 3125, 3250, 3325, 3458, 3500, 4375, 4550, 4750, 4940, 6175, 6250, 6500, 6650, 6916, 8125, 8645, 8750, 9100, 9500, 11375, 11875, 12350, 12500, 13300, 16250, 16625, 17290, 17500, 21875, 22750, 23750, 24700, 30875, 32500, 33250, 34580, 40625, 43225, 43750, 45500, 47500, 56875, 59375, 61750, 66500, 81250, 83125, 86450, 87500, 113750, 118750, 123500, 154375, 162500, 166250, 172900, 216125, 227500, 237500, 284375, 308750, 332500, 415625, 432250, 568750, 617500, 771875, 831250, 864500, 1080625, 1137500, 1543750, 1662500, 2161250, 3087500, 4322500, 5403125, 10806250, 21612500]

約数ペア:

[(1, 21612500), (2, 10806250), (4, 5403125), (5, 4322500), (7, 3087500), (10, 2161250), (13, 1662500), (14, 1543750), (19, 1137500), (20, 1080625), (25, 864500), (26, 831250), (28, 771875), (35, 617500), (38, 568750), (50, 432250), (52, 415625), (65, 332500), (70, 308750), (76, 284375), (91, 237500), (95, 227500), (100, 216125), (125, 172900), (130, 166250), (133, 162500), (140, 154375), (175, 123500), (182, 118750), (190, 113750), (247, 87500), (250, 86450), (260, 83125), (266, 81250), (325, 66500), (350, 61750), (364, 59375), (380, 56875), (455, 47500), (475, 45500), (494, 43750), (500, 43225), (532, 40625), (625, 34580), (650, 33250), (665, 32500), (700, 30875), (875, 24700), (910, 23750), (950, 22750), (988, 21875), (1235, 17500), (1250, 17290), (1300, 16625), (1330, 16250), (1625, 13300), (1729, 12500), (1750, 12350), (1820, 11875), (1900, 11375), (2275, 9500), (2375, 9100), (2470, 8750), (2500, 8645), (2660, 8125), (3125, 6916), (3250, 6650), (3325, 6500), (3458, 6250), (3500, 6175), (4375, 4940), (4550, 4750)]