21000908020

素因数分解:

$2^2\times 5^1\times {\mathrm{1471}}^1\times {\mathrm{713831}}^1$

素因数の和:715311

約数の個数: 24

約数和(自身を含む): 44131949568

約数和(自身を除く): 23131041548

約数列:

[1, 2, 4, 5, 10, 20, 1471, 2942, 5884, 7355, 14710, 29420, 713831, 1427662, 2855324, 3569155, 7138310, 14276620, 1050045401, 2100090802, 4200181604, 5250227005, 10500454010, 21000908020]

約数ペア:

[(1, 21000908020), (2, 10500454010), (4, 5250227005), (5, 4200181604), (10, 2100090802), (20, 1050045401), (1471, 14276620), (2942, 7138310), (5884, 3569155), (7355, 2855324), (14710, 1427662), (29420, 713831)]