21019960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40423}}^1$

素因数の和:40447

約数の個数: 32

約数和(自身を含む): 50934240

約数和(自身を除く): 29914280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40423, 80846, 161692, 202115, 323384, 404230, 525499, 808460, 1050998, 1616920, 2101996, 2627495, 4203992, 5254990, 10509980, 21019960]

約数ペア:

[(1, 21019960), (2, 10509980), (4, 5254990), (5, 4203992), (8, 2627495), (10, 2101996), (13, 1616920), (20, 1050998), (26, 808460), (40, 525499), (52, 404230), (65, 323384), (104, 202115), (130, 161692), (260, 80846), (520, 40423)]