18178990

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{439}}^1$

素因数の和:588

約数の個数: 32

約数和(自身を含む): 33929280

約数和(自身を除く): 15750290

約数列:

[1, 2, 5, 10, 41, 82, 101, 202, 205, 410, 439, 505, 878, 1010, 2195, 4141, 4390, 8282, 17999, 20705, 35998, 41410, 44339, 88678, 89995, 179990, 221695, 443390, 1817899, 3635798, 9089495, 18178990]

約数ペア:

[(1, 18178990), (2, 9089495), (5, 3635798), (10, 1817899), (41, 443390), (82, 221695), (101, 179990), (202, 89995), (205, 88678), (410, 44339), (439, 41410), (505, 35998), (878, 20705), (1010, 17999), (2195, 8282), (4141, 4390)]