20172062480

素因数分解:

$2^4\times 5^1\times {\mathrm{647}}^1\times {\mathrm{389723}}^1$

素因数の和:390383

約数の個数: 40

約数和(自身を含む): 46972654272

約数和(自身を除く): 26800591792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 647, 1294, 2588, 3235, 5176, 6470, 10352, 12940, 25880, 51760, 389723, 779446, 1558892, 1948615, 3117784, 3897230, 6235568, 7794460, 15588920, 31177840, 252150781, 504301562, 1008603124, 1260753905, 2017206248, 2521507810, 4034412496, 5043015620, 10086031240, 20172062480]

約数ペア:

[(1, 20172062480), (2, 10086031240), (4, 5043015620), (5, 4034412496), (8, 2521507810), (10, 2017206248), (16, 1260753905), (20, 1008603124), (40, 504301562), (80, 252150781), (647, 31177840), (1294, 15588920), (2588, 7794460), (3235, 6235568), (5176, 3897230), (6470, 3117784), (10352, 1948615), (12940, 1558892), (25880, 779446), (51760, 389723)]