20663980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{33329}}^1$

素因数の和:33369

約数の個数: 24

約数和(自身を含む): 44795520

約数和(自身を除く): 24131540

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 33329, 66658, 133316, 166645, 333290, 666580, 1033199, 2066398, 4132796, 5165995, 10331990, 20663980]

約数ペア:

[(1, 20663980), (2, 10331990), (4, 5165995), (5, 4132796), (10, 2066398), (20, 1033199), (31, 666580), (62, 333290), (124, 166645), (155, 133316), (310, 66658), (620, 33329)]