21731775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{719}}^1$

素因数の和:776

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 18265665

約数列:

[1, 3, 5, 13, 15, 25, 31, 39, 65, 75, 93, 155, 195, 325, 403, 465, 719, 775, 975, 1209, 2015, 2157, 2325, 3595, 6045, 9347, 10075, 10785, 17975, 22289, 28041, 30225, 46735, 53925, 66867, 111445, 140205, 233675, 289757, 334335, 557225, 701025, 869271, 1448785, 1671675, 4346355, 7243925, 21731775]

約数ペア:

[(1, 21731775), (3, 7243925), (5, 4346355), (13, 1671675), (15, 1448785), (25, 869271), (31, 701025), (39, 557225), (65, 334335), (75, 289757), (93, 233675), (155, 140205), (195, 111445), (325, 66867), (403, 53925), (465, 46735), (719, 30225), (775, 28041), (975, 22289), (1209, 17975), (2015, 10785), (2157, 10075), (2325, 9347), (3595, 6045)]