20391620

素因数分解:

$2^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{2027}}^1$

素因数の和:2539

約数の個数: 24

約数和(自身を含む): 42928704

約数和(自身を除く): 22537084

約数列:

[1, 2, 4, 5, 10, 20, 503, 1006, 2012, 2027, 2515, 4054, 5030, 8108, 10060, 10135, 20270, 40540, 1019581, 2039162, 4078324, 5097905, 10195810, 20391620]

約数ペア:

[(1, 20391620), (2, 10195810), (4, 5097905), (5, 4078324), (10, 2039162), (20, 1019581), (503, 40540), (1006, 20270), (2012, 10135), (2027, 10060), (2515, 8108), (4054, 5030)]