21212429

素因数分解:

$7^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1\times {\mathrm{223}}^1$

素因数の和:464

約数の個数: 16

約数和(自身を含む): 24772608

約数和(自身を除く): 3560179

約数列:

[1, 7, 107, 127, 223, 749, 889, 1561, 13589, 23861, 28321, 95123, 167027, 198247, 3030347, 21212429]

約数ペア:

[(1, 21212429), (7, 3030347), (107, 198247), (127, 167027), (223, 95123), (749, 28321), (889, 23861), (1561, 13589)]