21025809

素因数分解:

$3^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{4021}}^1$

素因数の和:4117

約数の個数: 24

約数和(自身を含む): 35136192

約数和(自身を除く): 14110383

約数列:

[1, 3, 7, 9, 21, 63, 83, 249, 581, 747, 1743, 4021, 5229, 12063, 28147, 36189, 84441, 253323, 333743, 1001229, 2336201, 3003687, 7008603, 21025809]

約数ペア:

[(1, 21025809), (3, 7008603), (7, 3003687), (9, 2336201), (21, 1001229), (63, 333743), (83, 253323), (249, 84441), (581, 36189), (747, 28147), (1743, 12063), (4021, 5229)]