21167982980

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1601209}}^1$

素因数の和:1601879

約数の個数: 24

約数和(自身を含む): 44520042840

約数和(自身を除く): 23352059860

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 2644, 3305, 6610, 13220, 1601209, 3202418, 6404836, 8006045, 16012090, 32024180, 1058399149, 2116798298, 4233596596, 5291995745, 10583991490, 21167982980]

約数ペア:

[(1, 21167982980), (2, 10583991490), (4, 5291995745), (5, 4233596596), (10, 2116798298), (20, 1058399149), (661, 32024180), (1322, 16012090), (2644, 8006045), (3305, 6404836), (6610, 3202418), (13220, 1601209)]