686665640

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{206827}}^1$

素因数の和:206921

約数の個数: 32

約数和(自身を含む): 1563619680

約数和(自身を除く): 876954040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 206827, 413654, 827308, 1034135, 1654616, 2068270, 4136540, 8273080, 17166641, 34333282, 68666564, 85833205, 137333128, 171666410, 343332820, 686665640]

約数ペア:

[(1, 686665640), (2, 343332820), (4, 171666410), (5, 137333128), (8, 85833205), (10, 68666564), (20, 34333282), (40, 17166641), (83, 8273080), (166, 4136540), (332, 2068270), (415, 1654616), (664, 1034135), (830, 827308), (1660, 413654), (3320, 206827)]