21919420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26731}}^1$

素因数の和:26781

約数の個数: 24

約数和(自身を含む): 47155248

約数和(自身を除く): 25235828

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26731, 53462, 106924, 133655, 267310, 534620, 1095971, 2191942, 4383884, 5479855, 10959710, 21919420]

約数ペア:

[(1, 21919420), (2, 10959710), (4, 5479855), (5, 4383884), (10, 2191942), (20, 1095971), (41, 534620), (82, 267310), (164, 133655), (205, 106924), (410, 53462), (820, 26731)]