20581925

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 32081280

約数和(自身を除く): 11499355

約数列:

[1, 5, 7, 13, 25, 35, 65, 83, 91, 109, 175, 325, 415, 455, 545, 581, 763, 1079, 1417, 2075, 2275, 2725, 2905, 3815, 5395, 7085, 7553, 9047, 9919, 14525, 19075, 26975, 35425, 37765, 45235, 49595, 63329, 117611, 188825, 226175, 247975, 316645, 588055, 823277, 1583225, 2940275, 4116385, 20581925]

約数ペア:

[(1, 20581925), (5, 4116385), (7, 2940275), (13, 1583225), (25, 823277), (35, 588055), (65, 316645), (83, 247975), (91, 226175), (109, 188825), (175, 117611), (325, 63329), (415, 49595), (455, 45235), (545, 37765), (581, 35425), (763, 26975), (1079, 19075), (1417, 14525), (2075, 9919), (2275, 9047), (2725, 7553), (2905, 7085), (3815, 5395)]