20181636740

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{163573}}^1$

素因数の和:163812

約数の個数: 48

約数和(自身を含む): 43968691200

約数和(自身を除く): 23787054460

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 199, 310, 398, 620, 796, 995, 1990, 3980, 6169, 12338, 24676, 30845, 61690, 123380, 163573, 327146, 654292, 817865, 1635730, 3271460, 5070763, 10141526, 20283052, 25353815, 32551027, 50707630, 65102054, 101415260, 130204108, 162755135, 325510270, 651020540, 1009081837, 2018163674, 4036327348, 5045409185, 10090818370, 20181636740]

約数ペア:

[(1, 20181636740), (2, 10090818370), (4, 5045409185), (5, 4036327348), (10, 2018163674), (20, 1009081837), (31, 651020540), (62, 325510270), (124, 162755135), (155, 130204108), (199, 101415260), (310, 65102054), (398, 50707630), (620, 32551027), (796, 25353815), (995, 20283052), (1990, 10141526), (3980, 5070763), (6169, 3271460), (12338, 1635730), (24676, 817865), (30845, 654292), (61690, 327146), (123380, 163573)]