21351760

素因数分解:

$2^4\times 5^1\times {\mathrm{266897}}^1$

素因数の和:266910

約数の個数: 20

約数和(自身を含む): 49643028

約数和(自身を除く): 28291268

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266897, 533794, 1067588, 1334485, 2135176, 2668970, 4270352, 5337940, 10675880, 21351760]

約数ペア:

[(1, 21351760), (2, 10675880), (4, 5337940), (5, 4270352), (8, 2668970), (10, 2135176), (16, 1334485), (20, 1067588), (40, 533794), (80, 266897)]