20519620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4909}}^1$

素因数の和:4948

約数の個数: 48

約数和(自身を含む): 49492800

約数和(自身を除く): 28973180

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4909, 9818, 19636, 24545, 49090, 53999, 93271, 98180, 107998, 186542, 215996, 269995, 373084, 466355, 539990, 932710, 1025981, 1079980, 1865420, 2051962, 4103924, 5129905, 10259810, 20519620]

約数ペア:

[(1, 20519620), (2, 10259810), (4, 5129905), (5, 4103924), (10, 2051962), (11, 1865420), (19, 1079980), (20, 1025981), (22, 932710), (38, 539990), (44, 466355), (55, 373084), (76, 269995), (95, 215996), (110, 186542), (190, 107998), (209, 98180), (220, 93271), (380, 53999), (418, 49090), (836, 24545), (1045, 19636), (2090, 9818), (4180, 4909)]