21266480

素因数分解:

$2^4\times 5^1\times {\mathrm{265831}}^1$

素因数の和:265844

約数の個数: 20

約数和(自身を含む): 49444752

約数和(自身を除く): 28178272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265831, 531662, 1063324, 1329155, 2126648, 2658310, 4253296, 5316620, 10633240, 21266480]

約数ペア:

[(1, 21266480), (2, 10633240), (4, 5316620), (5, 4253296), (8, 2658310), (10, 2126648), (16, 1329155), (20, 1063324), (40, 531662), (80, 265831)]