978400

素因数分解:

$2^5\times 5^2\times {\mathrm{1223}}^1$

素因数の和:1243

約数の個数: 36

約数和(自身を含む): 2390472

約数和(自身を除く): 1412072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800, 1223, 2446, 4892, 6115, 9784, 12230, 19568, 24460, 30575, 39136, 48920, 61150, 97840, 122300, 195680, 244600, 489200, 978400]

約数ペア:

[(1, 978400), (2, 489200), (4, 244600), (5, 195680), (8, 122300), (10, 97840), (16, 61150), (20, 48920), (25, 39136), (32, 30575), (40, 24460), (50, 19568), (80, 12230), (100, 9784), (160, 6115), (200, 4892), (400, 2446), (800, 1223)]