21917780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26729}}^1$

素因数の和:26779

約数の個数: 24

約数和(自身を含む): 47151720

約数和(自身を除く): 25233940

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26729, 53458, 106916, 133645, 267290, 534580, 1095889, 2191778, 4383556, 5479445, 10958890, 21917780]

約数ペア:

[(1, 21917780), (2, 10958890), (4, 5479445), (5, 4383556), (10, 2191778), (20, 1095889), (41, 534580), (82, 267290), (164, 133645), (205, 106916), (410, 53458), (820, 26729)]