20447920

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11113}}^1$

素因数の和:11149

約数の個数: 40

約数和(自身を含む): 49612896

約数和(自身を除く): 29164976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11113, 22226, 44452, 55565, 88904, 111130, 177808, 222260, 255599, 444520, 511198, 889040, 1022396, 1277995, 2044792, 2555990, 4089584, 5111980, 10223960, 20447920]

約数ペア:

[(1, 20447920), (2, 10223960), (4, 5111980), (5, 4089584), (8, 2555990), (10, 2044792), (16, 1277995), (20, 1022396), (23, 889040), (40, 511198), (46, 444520), (80, 255599), (92, 222260), (115, 177808), (184, 111130), (230, 88904), (368, 55565), (460, 44452), (920, 22226), (1840, 11113)]