21998405

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{2797}}^1$

素因数の和:2837

約数の個数: 24

約数和(自身を含む): 31259256

約数和(自身を除く): 9260851

約数列:

[1, 5, 11, 13, 55, 65, 121, 143, 605, 715, 1573, 2797, 7865, 13985, 30767, 36361, 153835, 181805, 338437, 399971, 1692185, 1999855, 4399681, 21998405]

約数ペア:

[(1, 21998405), (5, 4399681), (11, 1999855), (13, 1692185), (55, 399971), (65, 338437), (121, 181805), (143, 153835), (605, 36361), (715, 30767), (1573, 13985), (2797, 7865)]