20400275

素因数分解:

$5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{2711}}^1$

素因数の和:2771

約数の個数: 24

約数和(自身を含む): 29593344

約数和(自身を除く): 9193069

約数列:

[1, 5, 7, 25, 35, 43, 175, 215, 301, 1075, 1505, 2711, 7525, 13555, 18977, 67775, 94885, 116573, 474425, 582865, 816011, 2914325, 4080055, 20400275]

約数ペア:

[(1, 20400275), (5, 4080055), (7, 2914325), (25, 816011), (35, 582865), (43, 474425), (175, 116573), (215, 94885), (301, 67775), (1075, 18977), (1505, 13555), (2711, 7525)]