12928400

素因数分解:

$2^4\times 5^2\times {\mathrm{32321}}^1$

素因数の和:32339

約数の個数: 30

約数和(自身を含む): 31061442

約数和(自身を除く): 18133042

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 32321, 64642, 129284, 161605, 258568, 323210, 517136, 646420, 808025, 1292840, 1616050, 2585680, 3232100, 6464200, 12928400]

約数ペア:

[(1, 12928400), (2, 6464200), (4, 3232100), (5, 2585680), (8, 1616050), (10, 1292840), (16, 808025), (20, 646420), (25, 517136), (40, 323210), (50, 258568), (80, 161605), (100, 129284), (200, 64642), (400, 32321)]