81755180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{383}}^1\times {\mathrm{821}}^1$

素因数の和:1226

約数の個数: 48

約数和(自身を含む): 185601024

約数和(自身を除く): 103845844

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 383, 766, 821, 1532, 1642, 1915, 3284, 3830, 4105, 4979, 7660, 8210, 9958, 10673, 16420, 19916, 21346, 24895, 42692, 49790, 53365, 99580, 106730, 213460, 314443, 628886, 1257772, 1572215, 3144430, 4087759, 6288860, 8175518, 16351036, 20438795, 40877590, 81755180]

約数ペア:

[(1, 81755180), (2, 40877590), (4, 20438795), (5, 16351036), (10, 8175518), (13, 6288860), (20, 4087759), (26, 3144430), (52, 1572215), (65, 1257772), (130, 628886), (260, 314443), (383, 213460), (766, 106730), (821, 99580), (1532, 53365), (1642, 49790), (1915, 42692), (3284, 24895), (3830, 21346), (4105, 19916), (4979, 16420), (7660, 10673), (8210, 9958)]