21148309

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{757}}^1$

素因数の和:1084

約数の個数: 16

約数和(自身を含む): 26147968

約数和(自身を除く): 4999659

約数列:

[1, 7, 13, 91, 307, 757, 2149, 3991, 5299, 9841, 27937, 68887, 232399, 1626793, 3021187, 21148309]

約数ペア:

[(1, 21148309), (7, 3021187), (13, 1626793), (91, 232399), (307, 68887), (757, 27937), (2149, 9841), (3991, 5299)]