18630825

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 32408640

約数和(自身を除く): 13777815

約数列:

[1, 3, 5, 15, 25, 43, 53, 75, 109, 129, 159, 215, 265, 327, 545, 645, 795, 1075, 1325, 1635, 2279, 2725, 3225, 3975, 4687, 5777, 6837, 8175, 11395, 14061, 17331, 23435, 28885, 34185, 56975, 70305, 86655, 117175, 144425, 170925, 248411, 351525, 433275, 745233, 1242055, 3726165, 6210275, 18630825]

約数ペア:

[(1, 18630825), (3, 6210275), (5, 3726165), (15, 1242055), (25, 745233), (43, 433275), (53, 351525), (75, 248411), (109, 170925), (129, 144425), (159, 117175), (215, 86655), (265, 70305), (327, 56975), (545, 34185), (645, 28885), (795, 23435), (1075, 17331), (1325, 14061), (1635, 11395), (2279, 8175), (2725, 6837), (3225, 5777), (3975, 4687)]