12978400

素因数分解:

$2^5\times 5^2\times {\mathrm{16223}}^1$

素因数の和:16243

約数の個数: 36

約数和(自身を含む): 31685472

約数和(自身を除く): 18707072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800, 16223, 32446, 64892, 81115, 129784, 162230, 259568, 324460, 405575, 519136, 648920, 811150, 1297840, 1622300, 2595680, 3244600, 6489200, 12978400]

約数ペア:

[(1, 12978400), (2, 6489200), (4, 3244600), (5, 2595680), (8, 1622300), (10, 1297840), (16, 811150), (20, 648920), (25, 519136), (32, 405575), (40, 324460), (50, 259568), (80, 162230), (100, 129784), (160, 81115), (200, 64892), (400, 32446), (800, 16223)]