21115940

素因数分解:

$2^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{2099}}^1$

素因数の和:2611

約数の個数: 24

約数和(自身を含む): 44452800

約数和(自身を除く): 23336860

約数列:

[1, 2, 4, 5, 10, 20, 503, 1006, 2012, 2099, 2515, 4198, 5030, 8396, 10060, 10495, 20990, 41980, 1055797, 2111594, 4223188, 5278985, 10557970, 21115940]

約数ペア:

[(1, 21115940), (2, 10557970), (4, 5278985), (5, 4223188), (10, 2111594), (20, 1055797), (503, 41980), (1006, 20990), (2012, 10495), (2099, 10060), (2515, 8396), (4198, 5030)]