21663760

素因数分解:

$2^4\times 5^1\times {\mathrm{270797}}^1$

素因数の和:270810

約数の個数: 20

約数和(自身を含む): 50368428

約数和(自身を除く): 28704668

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270797, 541594, 1083188, 1353985, 2166376, 2707970, 4332752, 5415940, 10831880, 21663760]

約数ペア:

[(1, 21663760), (2, 10831880), (4, 5415940), (5, 4332752), (8, 2707970), (10, 2166376), (16, 1353985), (20, 1083188), (40, 541594), (80, 270797)]