18220040

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1621}}^1$

素因数の和:1913

約数の個数: 32

約数和(自身を含む): 41166360

約数和(自身を除く): 22946320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 1621, 2248, 2810, 3242, 5620, 6484, 8105, 11240, 12968, 16210, 32420, 64840, 455501, 911002, 1822004, 2277505, 3644008, 4555010, 9110020, 18220040]

約数ペア:

[(1, 18220040), (2, 9110020), (4, 4555010), (5, 3644008), (8, 2277505), (10, 1822004), (20, 911002), (40, 455501), (281, 64840), (562, 32420), (1124, 16210), (1405, 12968), (1621, 11240), (2248, 8105), (2810, 6484), (3242, 5620)]