21993725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 31664640

約数和(自身を除く): 9670915

約数列:

[1, 5, 13, 25, 31, 37, 59, 65, 155, 185, 295, 325, 403, 481, 767, 775, 925, 1147, 1475, 1829, 2015, 2183, 2405, 3835, 5735, 9145, 10075, 10915, 12025, 14911, 19175, 23777, 28379, 28675, 45725, 54575, 67673, 74555, 118885, 141895, 338365, 372775, 594425, 709475, 879749, 1691825, 4398745, 21993725]

約数ペア:

[(1, 21993725), (5, 4398745), (13, 1691825), (25, 879749), (31, 709475), (37, 594425), (59, 372775), (65, 338365), (155, 141895), (185, 118885), (295, 74555), (325, 67673), (403, 54575), (481, 45725), (767, 28675), (775, 28379), (925, 23777), (1147, 19175), (1475, 14911), (1829, 12025), (2015, 10915), (2183, 10075), (2405, 9145), (3835, 5735)]