199431875

素因数分解:

$5^4\times {\mathrm{61}}^1\times {\mathrm{5231}}^1$

素因数の和:5312

約数の個数: 20

約数和(自身を含む): 253343904

約数和(自身を除く): 53912029

約数列:

[1, 5, 25, 61, 125, 305, 625, 1525, 5231, 7625, 26155, 38125, 130775, 319091, 653875, 1595455, 3269375, 7977275, 39886375, 199431875]

約数ペア:

[(1, 199431875), (5, 39886375), (25, 7977275), (61, 3269375), (125, 1595455), (305, 653875), (625, 319091), (1525, 130775), (5231, 38125), (7625, 26155)]