20565799820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{389}}^1\times {\mathrm{33461}}^1$

素因数の和:33938

約数の個数: 48

約数和(自身を含む): 43848604800

約数和(自身を除く): 23282804980

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 389, 395, 778, 790, 1556, 1580, 1945, 3890, 7780, 30731, 33461, 61462, 66922, 122924, 133844, 153655, 167305, 307310, 334610, 614620, 669220, 2643419, 5286838, 10573676, 13016329, 13217095, 26032658, 26434190, 52065316, 52868380, 65081645, 130163290, 260326580, 1028289991, 2056579982, 4113159964, 5141449955, 10282899910, 20565799820]

約数ペア:

[(1, 20565799820), (2, 10282899910), (4, 5141449955), (5, 4113159964), (10, 2056579982), (20, 1028289991), (79, 260326580), (158, 130163290), (316, 65081645), (389, 52868380), (395, 52065316), (778, 26434190), (790, 26032658), (1556, 13217095), (1580, 13016329), (1945, 10573676), (3890, 5286838), (7780, 2643419), (30731, 669220), (33461, 614620), (61462, 334610), (66922, 307310), (122924, 167305), (133844, 153655)]