66678280

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{4157}}^1$

素因数の和:4569

約数の個数: 32

約数和(自身を含む): 150436440

約数和(自身を除く): 83758160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 4157, 8020, 8314, 16040, 16628, 20785, 33256, 41570, 83140, 166280, 1666957, 3333914, 6667828, 8334785, 13335656, 16669570, 33339140, 66678280]

約数ペア:

[(1, 66678280), (2, 33339140), (4, 16669570), (5, 13335656), (8, 8334785), (10, 6667828), (20, 3333914), (40, 1666957), (401, 166280), (802, 83140), (1604, 41570), (2005, 33256), (3208, 20785), (4010, 16628), (4157, 16040), (8020, 8314)]