81166040

素因数分解:

$2^3\times 5^1\times {\mathrm{557}}^1\times {\mathrm{3643}}^1$

素因数の和:4211

約数の個数: 32

約数和(自身を含む): 183001680

約数和(自身を除く): 101835640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 557, 1114, 2228, 2785, 3643, 4456, 5570, 7286, 11140, 14572, 18215, 22280, 29144, 36430, 72860, 145720, 2029151, 4058302, 8116604, 10145755, 16233208, 20291510, 40583020, 81166040]

約数ペア:

[(1, 81166040), (2, 40583020), (4, 20291510), (5, 16233208), (8, 10145755), (10, 8116604), (20, 4058302), (40, 2029151), (557, 145720), (1114, 72860), (2228, 36430), (2785, 29144), (3643, 22280), (4456, 18215), (5570, 14572), (7286, 11140)]