20365520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{887}}^1$

素因数の和:948

約数の個数: 80

約数和(自身を含む): 55496448

約数和(自身を除く): 35130928

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 41, 56, 70, 80, 82, 112, 140, 164, 205, 280, 287, 328, 410, 560, 574, 656, 820, 887, 1148, 1435, 1640, 1774, 2296, 2870, 3280, 3548, 4435, 4592, 5740, 6209, 7096, 8870, 11480, 12418, 14192, 17740, 22960, 24836, 31045, 35480, 36367, 49672, 62090, 70960, 72734, 99344, 124180, 145468, 181835, 248360, 254569, 290936, 363670, 496720, 509138, 581872, 727340, 1018276, 1272845, 1454680, 2036552, 2545690, 2909360, 4073104, 5091380, 10182760, 20365520]

約数ペア:

[(1, 20365520), (2, 10182760), (4, 5091380), (5, 4073104), (7, 2909360), (8, 2545690), (10, 2036552), (14, 1454680), (16, 1272845), (20, 1018276), (28, 727340), (35, 581872), (40, 509138), (41, 496720), (56, 363670), (70, 290936), (80, 254569), (82, 248360), (112, 181835), (140, 145468), (164, 124180), (205, 99344), (280, 72734), (287, 70960), (328, 62090), (410, 49672), (560, 36367), (574, 35480), (656, 31045), (820, 24836), (887, 22960), (1148, 17740), (1435, 14192), (1640, 12418), (1774, 11480), (2296, 8870), (2870, 7096), (3280, 6209), (3548, 5740), (4435, 4592)]