19949360

素因数分解:

$2^4\times 5^1\times {\mathrm{249367}}^1$

素因数の和:249380

約数の個数: 20

約数和(自身を含む): 46382448

約数和(自身を除く): 26433088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249367, 498734, 997468, 1246835, 1994936, 2493670, 3989872, 4987340, 9974680, 19949360]

約数ペア:

[(1, 19949360), (2, 9974680), (4, 4987340), (5, 3989872), (8, 2493670), (10, 1994936), (16, 1246835), (20, 997468), (40, 498734), (80, 249367)]