19871240

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1933}}^1$

素因数の和:2201

約数の個数: 32

約数和(自身を含む): 44907480

約数和(自身を除く): 25036240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 1933, 2056, 2570, 3866, 5140, 7732, 9665, 10280, 15464, 19330, 38660, 77320, 496781, 993562, 1987124, 2483905, 3974248, 4967810, 9935620, 19871240]

約数ペア:

[(1, 19871240), (2, 9935620), (4, 4967810), (5, 3974248), (8, 2483905), (10, 1987124), (20, 993562), (40, 496781), (257, 77320), (514, 38660), (1028, 19330), (1285, 15464), (1933, 10280), (2056, 9665), (2570, 7732), (3866, 5140)]