21779960

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7669}}^1$

素因数の和:7751

約数の個数: 32

約数和(自身を含む): 49701600

約数和(自身を除く): 27921640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7669, 15338, 30676, 38345, 61352, 76690, 153380, 306760, 544499, 1088998, 2177996, 2722495, 4355992, 5444990, 10889980, 21779960]

約数ペア:

[(1, 21779960), (2, 10889980), (4, 5444990), (5, 4355992), (8, 2722495), (10, 2177996), (20, 1088998), (40, 544499), (71, 306760), (142, 153380), (284, 76690), (355, 61352), (568, 38345), (710, 30676), (1420, 15338), (2840, 7669)]