21558580

素因数分解:

$2^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{2143}}^1$

素因数の和:2655

約数の個数: 24

約数和(自身を含む): 45384192

約数和(自身を除く): 23825612

約数列:

[1, 2, 4, 5, 10, 20, 503, 1006, 2012, 2143, 2515, 4286, 5030, 8572, 10060, 10715, 21430, 42860, 1077929, 2155858, 4311716, 5389645, 10779290, 21558580]

約数ペア:

[(1, 21558580), (2, 10779290), (4, 5389645), (5, 4311716), (10, 2155858), (20, 1077929), (503, 42860), (1006, 21430), (2012, 10715), (2143, 10060), (2515, 8572), (4286, 5030)]