278520820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{409}}^1\times {\mathrm{431}}^1$

素因数の和:928

約数の個数: 48

約数和(自身を含む): 595123200

約数和(自身を除く): 316602380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 409, 431, 790, 818, 862, 1580, 1636, 1724, 2045, 2155, 4090, 4310, 8180, 8620, 32311, 34049, 64622, 68098, 129244, 136196, 161555, 170245, 176279, 323110, 340490, 352558, 646220, 680980, 705116, 881395, 1762790, 3525580, 13926041, 27852082, 55704164, 69630205, 139260410, 278520820]

約数ペア:

[(1, 278520820), (2, 139260410), (4, 69630205), (5, 55704164), (10, 27852082), (20, 13926041), (79, 3525580), (158, 1762790), (316, 881395), (395, 705116), (409, 680980), (431, 646220), (790, 352558), (818, 340490), (862, 323110), (1580, 176279), (1636, 170245), (1724, 161555), (2045, 136196), (2155, 129244), (4090, 68098), (4310, 64622), (8180, 34049), (8620, 32311)]