256515

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{349}}^1$

素因数の和:371

約数の個数: 24

約数和(自身を含む): 478800

約数和(自身を除く): 222285

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 349, 735, 1047, 1745, 2443, 5235, 7329, 12215, 17101, 36645, 51303, 85505, 256515]

約数ペア:

[(1, 256515), (3, 85505), (5, 51303), (7, 36645), (15, 17101), (21, 12215), (35, 7329), (49, 5235), (105, 2443), (147, 1745), (245, 1047), (349, 735)]