20377220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{821}}^1$

素因数の和:920

約数の個数: 48

約数和(自身を含む): 45985968

約数和(自身を除く): 25608748

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 73, 85, 146, 170, 292, 340, 365, 730, 821, 1241, 1460, 1642, 2482, 3284, 4105, 4964, 6205, 8210, 12410, 13957, 16420, 24820, 27914, 55828, 59933, 69785, 119866, 139570, 239732, 279140, 299665, 599330, 1018861, 1198660, 2037722, 4075444, 5094305, 10188610, 20377220]

約数ペア:

[(1, 20377220), (2, 10188610), (4, 5094305), (5, 4075444), (10, 2037722), (17, 1198660), (20, 1018861), (34, 599330), (68, 299665), (73, 279140), (85, 239732), (146, 139570), (170, 119866), (292, 69785), (340, 59933), (365, 55828), (730, 27914), (821, 24820), (1241, 16420), (1460, 13957), (1642, 12410), (2482, 8210), (3284, 6205), (4105, 4964)]