21743240

素因数分解:

$2^3\times 5^1\times {\mathrm{337}}^1\times {\mathrm{1613}}^1$

素因数の和:1961

約数の個数: 32

約数和(自身を含む): 49097880

約数和(自身を除く): 27354640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 337, 674, 1348, 1613, 1685, 2696, 3226, 3370, 6452, 6740, 8065, 12904, 13480, 16130, 32260, 64520, 543581, 1087162, 2174324, 2717905, 4348648, 5435810, 10871620, 21743240]

約数ペア:

[(1, 21743240), (2, 10871620), (4, 5435810), (5, 4348648), (8, 2717905), (10, 2174324), (20, 1087162), (40, 543581), (337, 64520), (674, 32260), (1348, 16130), (1613, 13480), (1685, 12904), (2696, 8065), (3226, 6740), (3370, 6452)]