20981240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74933}}^1$

素因数の和:74951

約数の個数: 32

約数和(自身を含む): 53952480

約数和(自身を除く): 32971240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74933, 149866, 299732, 374665, 524531, 599464, 749330, 1049062, 1498660, 2098124, 2622655, 2997320, 4196248, 5245310, 10490620, 20981240]

約数ペア:

[(1, 20981240), (2, 10490620), (4, 5245310), (5, 4196248), (7, 2997320), (8, 2622655), (10, 2098124), (14, 1498660), (20, 1049062), (28, 749330), (35, 599464), (40, 524531), (56, 374665), (70, 299732), (140, 149866), (280, 74933)]