1990998440

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{179693}}^1$

素因数の和:179981

約数の個数: 32

約数和(自身を含む): 4495943880

約数和(自身を除く): 2504945440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 2216, 2770, 5540, 11080, 179693, 359386, 718772, 898465, 1437544, 1796930, 3593860, 7187720, 49774961, 99549922, 199099844, 248874805, 398199688, 497749610, 995499220, 1990998440]

約数ペア:

[(1, 1990998440), (2, 995499220), (4, 497749610), (5, 398199688), (8, 248874805), (10, 199099844), (20, 99549922), (40, 49774961), (277, 7187720), (554, 3593860), (1108, 1796930), (1385, 1437544), (2216, 898465), (2770, 718772), (5540, 359386), (11080, 179693)]