21107253680

素因数分解:

$2^4\times 5^1\times {\mathrm{263840671}}^1$

素因数の和:263840684

約数の個数: 20

約数和(自身を含む): 49074364992

約数和(自身を除く): 27967111312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263840671, 527681342, 1055362684, 1319203355, 2110725368, 2638406710, 4221450736, 5276813420, 10553626840, 21107253680]

約数ペア:

[(1, 21107253680), (2, 10553626840), (4, 5276813420), (5, 4221450736), (8, 2638406710), (10, 2110725368), (16, 1319203355), (20, 1055362684), (40, 527681342), (80, 263840671)]