18745240

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2221}}^1$

素因数の和:2443

約数の個数: 32

約数和(自身を含む): 42395760

約数和(自身を除く): 23650520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 2221, 4220, 4442, 8440, 8884, 11105, 17768, 22210, 44420, 88840, 468631, 937262, 1874524, 2343155, 3749048, 4686310, 9372620, 18745240]

約数ペア:

[(1, 18745240), (2, 9372620), (4, 4686310), (5, 3749048), (8, 2343155), (10, 1874524), (20, 937262), (40, 468631), (211, 88840), (422, 44420), (844, 22210), (1055, 17768), (1688, 11105), (2110, 8884), (2221, 8440), (4220, 4442)]