721880265

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1321}}^1\times {\mathrm{2143}}^1$

素因数の和:3489

約数の個数: 32

約数和(自身を含む): 1224446976

約数和(自身を除く): 502566711

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 1321, 2143, 3963, 6429, 6605, 10715, 19815, 22457, 32145, 36431, 67371, 109293, 112285, 182155, 336855, 546465, 2830903, 8492709, 14154515, 42463545, 48125351, 144376053, 240626755, 721880265]

約数ペア:

[(1, 721880265), (3, 240626755), (5, 144376053), (15, 48125351), (17, 42463545), (51, 14154515), (85, 8492709), (255, 2830903), (1321, 546465), (2143, 336855), (3963, 182155), (6429, 112285), (6605, 109293), (10715, 67371), (19815, 36431), (22457, 32145)]