20541616

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{409}}^1$

素因数の和:533

約数の個数: 40

約数和(自身を含む): 41383760

約数和(自身を除く): 20842144

約数列:

[1, 2, 4, 8, 16, 43, 73, 86, 146, 172, 292, 344, 409, 584, 688, 818, 1168, 1636, 3139, 3272, 6278, 6544, 12556, 17587, 25112, 29857, 35174, 50224, 59714, 70348, 119428, 140696, 238856, 281392, 477712, 1283851, 2567702, 5135404, 10270808, 20541616]

約数ペア:

[(1, 20541616), (2, 10270808), (4, 5135404), (8, 2567702), (16, 1283851), (43, 477712), (73, 281392), (86, 238856), (146, 140696), (172, 119428), (292, 70348), (344, 59714), (409, 50224), (584, 35174), (688, 29857), (818, 25112), (1168, 17587), (1636, 12556), (3139, 6544), (3272, 6278)]