20518875

素因数分解:

$3^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:118

約数の個数: 96

約数和(自身を含む): 42247296

約数和(自身を除く): 21728421

約数列:

[1, 3, 5, 9, 13, 15, 23, 25, 39, 45, 61, 65, 69, 75, 115, 117, 125, 183, 195, 207, 225, 299, 305, 325, 345, 375, 549, 575, 585, 793, 897, 915, 975, 1035, 1125, 1403, 1495, 1525, 1625, 1725, 2379, 2691, 2745, 2875, 2925, 3965, 4209, 4485, 4575, 4875, 5175, 7015, 7137, 7475, 7625, 8625, 11895, 12627, 13455, 13725, 14625, 18239, 19825, 21045, 22425, 22875, 25875, 35075, 35685, 37375, 54717, 59475, 63135, 67275, 68625, 91195, 99125, 105225, 112125, 164151, 175375, 178425, 273585, 297375, 315675, 336375, 455975, 526125, 820755, 892125, 1367925, 1578375, 2279875, 4103775, 6839625, 20518875]

約数ペア:

[(1, 20518875), (3, 6839625), (5, 4103775), (9, 2279875), (13, 1578375), (15, 1367925), (23, 892125), (25, 820755), (39, 526125), (45, 455975), (61, 336375), (65, 315675), (69, 297375), (75, 273585), (115, 178425), (117, 175375), (125, 164151), (183, 112125), (195, 105225), (207, 99125), (225, 91195), (299, 68625), (305, 67275), (325, 63135), (345, 59475), (375, 54717), (549, 37375), (575, 35685), (585, 35075), (793, 25875), (897, 22875), (915, 22425), (975, 21045), (1035, 19825), (1125, 18239), (1403, 14625), (1495, 13725), (1525, 13455), (1625, 12627), (1725, 11895), (2379, 8625), (2691, 7625), (2745, 7475), (2875, 7137), (2925, 7015), (3965, 5175), (4209, 4875), (4485, 4575)]