19487800

素因数分解:

$2^3\times 5^2\times {\mathrm{139}}^1\times {\mathrm{701}}^1$

素因数の和:856

約数の個数: 48

約数和(自身を含む): 45700200

約数和(自身を除く): 26212400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 139, 200, 278, 556, 695, 701, 1112, 1390, 1402, 2780, 2804, 3475, 3505, 5560, 5608, 6950, 7010, 13900, 14020, 17525, 27800, 28040, 35050, 70100, 97439, 140200, 194878, 389756, 487195, 779512, 974390, 1948780, 2435975, 3897560, 4871950, 9743900, 19487800]

約数ペア:

[(1, 19487800), (2, 9743900), (4, 4871950), (5, 3897560), (8, 2435975), (10, 1948780), (20, 974390), (25, 779512), (40, 487195), (50, 389756), (100, 194878), (139, 140200), (200, 97439), (278, 70100), (556, 35050), (695, 28040), (701, 27800), (1112, 17525), (1390, 14020), (1402, 13900), (2780, 7010), (2804, 6950), (3475, 5608), (3505, 5560)]