21000940220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80772847}}^1$

素因数の和:80772869

約数の個数: 24

約数和(自身を含む): 47494434624

約数和(自身を除く): 26493494404

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80772847, 161545694, 323091388, 403864235, 807728470, 1050047011, 1615456940, 2100094022, 4200188044, 5250235055, 10500470110, 21000940220]

約数ペア:

[(1, 21000940220), (2, 10500470110), (4, 5250235055), (5, 4200188044), (10, 2100094022), (13, 1615456940), (20, 1050047011), (26, 807728470), (52, 403864235), (65, 323091388), (130, 161545694), (260, 80772847)]