21630680

素因数分解:

$2^3\times 5^1\times {\mathrm{631}}^1\times {\mathrm{857}}^1$

素因数の和:1499

約数の個数: 32

約数和(自身を含む): 48803040

約数和(自身を除く): 27172360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 631, 857, 1262, 1714, 2524, 3155, 3428, 4285, 5048, 6310, 6856, 8570, 12620, 17140, 25240, 34280, 540767, 1081534, 2163068, 2703835, 4326136, 5407670, 10815340, 21630680]

約数ペア:

[(1, 21630680), (2, 10815340), (4, 5407670), (5, 4326136), (8, 2703835), (10, 2163068), (20, 1081534), (40, 540767), (631, 34280), (857, 25240), (1262, 17140), (1714, 12620), (2524, 8570), (3155, 6856), (3428, 6310), (4285, 5048)]