21271835

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{4483}}^1$

素因数の和:4574

約数の個数: 16

約数和(自身を含む): 27872544

約数和(自身を除く): 6600709

約数列:

[1, 5, 13, 65, 73, 365, 949, 4483, 4745, 22415, 58279, 291395, 327259, 1636295, 4254367, 21271835]

約数ペア:

[(1, 21271835), (5, 4254367), (13, 1636295), (65, 327259), (73, 291395), (365, 58279), (949, 22415), (4483, 4745)]