21126325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{4519}}^1$

素因数の和:4557

約数の個数: 24

約数和(自身を含む): 30265920

約数和(自身を除く): 9139595

約数列:

[1, 5, 11, 17, 25, 55, 85, 187, 275, 425, 935, 4519, 4675, 22595, 49709, 76823, 112975, 248545, 384115, 845053, 1242725, 1920575, 4225265, 21126325]

約数ペア:

[(1, 21126325), (5, 4225265), (11, 1920575), (17, 1242725), (25, 845053), (55, 384115), (85, 248545), (187, 112975), (275, 76823), (425, 49709), (935, 22595), (4519, 4675)]