406392020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{655471}}^1$

素因数の和:655511

約数の個数: 24

約数和(自身を含む): 880954368

約数和(自身を除く): 474562348

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 655471, 1310942, 2621884, 3277355, 6554710, 13109420, 20319601, 40639202, 81278404, 101598005, 203196010, 406392020]

約数ペア:

[(1, 406392020), (2, 203196010), (4, 101598005), (5, 81278404), (10, 40639202), (20, 20319601), (31, 13109420), (62, 6554710), (124, 3277355), (155, 2621884), (310, 1310942), (620, 655471)]