819640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:703

約数の個数: 32

約数和(自身を含む): 1906560

約数和(自身を除く): 1086920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 661, 1240, 1322, 2644, 3305, 5288, 6610, 13220, 20491, 26440, 40982, 81964, 102455, 163928, 204910, 409820, 819640]

約数ペア:

[(1, 819640), (2, 409820), (4, 204910), (5, 163928), (8, 102455), (10, 81964), (20, 40982), (31, 26440), (40, 20491), (62, 13220), (124, 6610), (155, 5288), (248, 3305), (310, 2644), (620, 1322), (661, 1240)]