21525320

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4937}}^1$

素因数の和:5057

約数の個数: 32

約数和(自身を含む): 48886200

約数和(自身を除く): 27360880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4937, 9874, 19748, 24685, 39496, 49370, 98740, 197480, 538133, 1076266, 2152532, 2690665, 4305064, 5381330, 10762660, 21525320]

約数ペア:

[(1, 21525320), (2, 10762660), (4, 5381330), (5, 4305064), (8, 2690665), (10, 2152532), (20, 1076266), (40, 538133), (109, 197480), (218, 98740), (436, 49370), (545, 39496), (872, 24685), (1090, 19748), (2180, 9874), (4360, 4937)]