640880643

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1\times {\mathrm{1487}}^1$

素因数の和:1803

約数の個数: 32

約数和(自身を含む): 945939456

約数和(自身を除く): 305058813

約数列:

[1, 3, 13, 39, 43, 129, 257, 559, 771, 1487, 1677, 3341, 4461, 10023, 11051, 19331, 33153, 57993, 63941, 143663, 191823, 382159, 430989, 831233, 1146477, 2493699, 4968067, 14904201, 16432837, 49298511, 213626881, 640880643]

約数ペア:

[(1, 640880643), (3, 213626881), (13, 49298511), (39, 16432837), (43, 14904201), (129, 4968067), (257, 2493699), (559, 1146477), (771, 831233), (1487, 430989), (1677, 382159), (3341, 191823), (4461, 143663), (10023, 63941), (11051, 57993), (19331, 33153)]