78216400

素因数分解:

$2^4\times 5^2\times {\mathrm{195541}}^1$

素因数の和:195559

約数の個数: 30

約数和(自身を含む): 187915862

約数和(自身を除く): 109699462

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 195541, 391082, 782164, 977705, 1564328, 1955410, 3128656, 3910820, 4888525, 7821640, 9777050, 15643280, 19554100, 39108200, 78216400]

約数ペア:

[(1, 78216400), (2, 39108200), (4, 19554100), (5, 15643280), (8, 9777050), (10, 7821640), (16, 4888525), (20, 3910820), (25, 3128656), (40, 1955410), (50, 1564328), (80, 977705), (100, 782164), (200, 391082), (400, 195541)]