20841575

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 30132000

約数和(自身を除く): 9290425

約数列:

[1, 5, 17, 19, 25, 29, 85, 89, 95, 145, 323, 425, 445, 475, 493, 551, 725, 1513, 1615, 1691, 2225, 2465, 2581, 2755, 7565, 8075, 8455, 9367, 12325, 12905, 13775, 28747, 37825, 42275, 43877, 46835, 49039, 64525, 143735, 219385, 234175, 245195, 718675, 833663, 1096925, 1225975, 4168315, 20841575]

約数ペア:

[(1, 20841575), (5, 4168315), (17, 1225975), (19, 1096925), (25, 833663), (29, 718675), (85, 245195), (89, 234175), (95, 219385), (145, 143735), (323, 64525), (425, 49039), (445, 46835), (475, 43877), (493, 42275), (551, 37825), (725, 28747), (1513, 13775), (1615, 12905), (1691, 12325), (2225, 9367), (2465, 8455), (2581, 8075), (2755, 7565)]