28408720

素因数分解:

$2^4\times 5^1\times {\mathrm{355109}}^1$

素因数の和:355122

約数の個数: 20

約数和(自身を含む): 66050460

約数和(自身を除く): 37641740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 355109, 710218, 1420436, 1775545, 2840872, 3551090, 5681744, 7102180, 14204360, 28408720]

約数ペア:

[(1, 28408720), (2, 14204360), (4, 7102180), (5, 5681744), (8, 3551090), (10, 2840872), (16, 1775545), (20, 1420436), (40, 710218), (80, 355109)]