21028865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29411}}^1$

素因数の和:29440

約数の個数: 16

約数和(自身を含む): 29647296

約数和(自身を除く): 8618431

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 29411, 147055, 323521, 382343, 1617605, 1911715, 4205773, 21028865]

約数ペア:

[(1, 21028865), (5, 4205773), (11, 1911715), (13, 1617605), (55, 382343), (65, 323521), (143, 147055), (715, 29411)]