21275275

素因数分解:

$5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1993}}^1$

素因数の和:2071

約数の個数: 24

約数和(自身を含む): 30659744

約数和(自身を除く): 9384469

約数列:

[1, 5, 7, 25, 35, 61, 175, 305, 427, 1525, 1993, 2135, 9965, 10675, 13951, 49825, 69755, 121573, 348775, 607865, 851011, 3039325, 4255055, 21275275]

約数ペア:

[(1, 21275275), (5, 4255055), (7, 3039325), (25, 851011), (35, 607865), (61, 348775), (175, 121573), (305, 69755), (427, 49825), (1525, 13951), (1993, 10675), (2135, 9965)]