20655910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:469

約数の個数: 48

約数和(自身を含む): 41923728

約数和(自身を除く): 21267818

約数列:

[1, 2, 5, 10, 11, 22, 43, 55, 86, 110, 121, 215, 242, 397, 430, 473, 605, 794, 946, 1210, 1985, 2365, 3970, 4367, 4730, 5203, 8734, 10406, 17071, 21835, 26015, 34142, 43670, 48037, 52030, 85355, 96074, 170710, 187781, 240185, 375562, 480370, 938905, 1877810, 2065591, 4131182, 10327955, 20655910]

約数ペア:

[(1, 20655910), (2, 10327955), (5, 4131182), (10, 2065591), (11, 1877810), (22, 938905), (43, 480370), (55, 375562), (86, 240185), (110, 187781), (121, 170710), (215, 96074), (242, 85355), (397, 52030), (430, 48037), (473, 43670), (605, 34142), (794, 26015), (946, 21835), (1210, 17071), (1985, 10406), (2365, 8734), (3970, 5203), (4367, 4730)]