21498220

素因数分解:

$2^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{2137}}^1$

素因数の和:2649

約数の個数: 24

約数和(自身を含む): 45257184

約数和(自身を除く): 23758964

約数列:

[1, 2, 4, 5, 10, 20, 503, 1006, 2012, 2137, 2515, 4274, 5030, 8548, 10060, 10685, 21370, 42740, 1074911, 2149822, 4299644, 5374555, 10749110, 21498220]

約数ペア:

[(1, 21498220), (2, 10749110), (4, 5374555), (5, 4299644), (10, 2149822), (20, 1074911), (503, 42740), (1006, 21370), (2012, 10685), (2137, 10060), (2515, 8548), (4274, 5030)]