20871160

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7349}}^1$

素因数の和:7431

約数の個数: 32

約数和(自身を含む): 47628000

約数和(自身を除く): 26756840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7349, 14698, 29396, 36745, 58792, 73490, 146980, 293960, 521779, 1043558, 2087116, 2608895, 4174232, 5217790, 10435580, 20871160]

約数ペア:

[(1, 20871160), (2, 10435580), (4, 5217790), (5, 4174232), (8, 2608895), (10, 2087116), (20, 1043558), (40, 521779), (71, 293960), (142, 146980), (284, 73490), (355, 58792), (568, 36745), (710, 29396), (1420, 14698), (2840, 7349)]