19812400

素因数分解:

$2^4\times 5^2\times {\mathrm{49531}}^1$

素因数の和:49549

約数の個数: 30

約数和(自身を含む): 47600252

約数和(自身を除く): 27787852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 49531, 99062, 198124, 247655, 396248, 495310, 792496, 990620, 1238275, 1981240, 2476550, 3962480, 4953100, 9906200, 19812400]

約数ペア:

[(1, 19812400), (2, 9906200), (4, 4953100), (5, 3962480), (8, 2476550), (10, 1981240), (16, 1238275), (20, 990620), (25, 792496), (40, 495310), (50, 396248), (80, 247655), (100, 198124), (200, 99062), (400, 49531)]