81234940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{631}}^1$

素因数の和:838

約数の個数: 48

約数和(自身を含む): 176145984

約数和(自身を除く): 94911044

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 157, 164, 205, 314, 410, 628, 631, 785, 820, 1262, 1570, 2524, 3140, 3155, 6310, 6437, 12620, 12874, 25748, 25871, 32185, 51742, 64370, 99067, 103484, 128740, 129355, 198134, 258710, 396268, 495335, 517420, 990670, 1981340, 4061747, 8123494, 16246988, 20308735, 40617470, 81234940]

約数ペア:

[(1, 81234940), (2, 40617470), (4, 20308735), (5, 16246988), (10, 8123494), (20, 4061747), (41, 1981340), (82, 990670), (157, 517420), (164, 495335), (205, 396268), (314, 258710), (410, 198134), (628, 129355), (631, 128740), (785, 103484), (820, 99067), (1262, 64370), (1570, 51742), (2524, 32185), (3140, 25871), (3155, 25748), (6310, 12874), (6437, 12620)]