81303020

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{233}}^1\times {\mathrm{239}}^1$

素因数の和:554

約数の個数: 48

約数和(自身を含む): 174545280

約数和(自身を除く): 93242260

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 233, 239, 292, 365, 466, 478, 730, 932, 956, 1165, 1195, 1460, 2330, 2390, 4660, 4780, 17009, 17447, 34018, 34894, 55687, 68036, 69788, 85045, 87235, 111374, 170090, 174470, 222748, 278435, 340180, 348940, 556870, 1113740, 4065151, 8130302, 16260604, 20325755, 40651510, 81303020]

約数ペア:

[(1, 81303020), (2, 40651510), (4, 20325755), (5, 16260604), (10, 8130302), (20, 4065151), (73, 1113740), (146, 556870), (233, 348940), (239, 340180), (292, 278435), (365, 222748), (466, 174470), (478, 170090), (730, 111374), (932, 87235), (956, 85045), (1165, 69788), (1195, 68036), (1460, 55687), (2330, 34894), (2390, 34018), (4660, 17447), (4780, 17009)]