18225040

素因数分解:

$2^4\times 5^1\times {\mathrm{409}}^1\times {\mathrm{557}}^1$

素因数の和:979

約数の個数: 40

約数和(自身を含む): 42553080

約数和(自身を除く): 24328040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 409, 557, 818, 1114, 1636, 2045, 2228, 2785, 3272, 4090, 4456, 5570, 6544, 8180, 8912, 11140, 16360, 22280, 32720, 44560, 227813, 455626, 911252, 1139065, 1822504, 2278130, 3645008, 4556260, 9112520, 18225040]

約数ペア:

[(1, 18225040), (2, 9112520), (4, 4556260), (5, 3645008), (8, 2278130), (10, 1822504), (16, 1139065), (20, 911252), (40, 455626), (80, 227813), (409, 44560), (557, 32720), (818, 22280), (1114, 16360), (1636, 11140), (2045, 8912), (2228, 8180), (2785, 6544), (3272, 5570), (4090, 4456)]