21055475

素因数分解:

$5^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1523}}^1$

素因数の和:1619

約数の個数: 24

約数和(自身を含む): 30236160

約数和(自身を除く): 9180685

約数列:

[1, 5, 7, 25, 35, 79, 175, 395, 553, 1523, 1975, 2765, 7615, 10661, 13825, 38075, 53305, 120317, 266525, 601585, 842219, 3007925, 4211095, 21055475]

約数ペア:

[(1, 21055475), (5, 4211095), (7, 3007925), (25, 842219), (35, 601585), (79, 266525), (175, 120317), (395, 53305), (553, 38075), (1523, 13825), (1975, 10661), (2765, 7615)]