19157500

素因数分解:

$2^2\times 5^4\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:200

約数の個数: 60

約数和(自身を含む): 42861280

約数和(自身を除く): 23703780

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 97, 100, 125, 158, 194, 250, 316, 388, 395, 485, 500, 625, 790, 970, 1250, 1580, 1940, 1975, 2425, 2500, 3950, 4850, 7663, 7900, 9700, 9875, 12125, 15326, 19750, 24250, 30652, 38315, 39500, 48500, 49375, 60625, 76630, 98750, 121250, 153260, 191575, 197500, 242500, 383150, 766300, 957875, 1915750, 3831500, 4789375, 9578750, 19157500]

約数ペア:

[(1, 19157500), (2, 9578750), (4, 4789375), (5, 3831500), (10, 1915750), (20, 957875), (25, 766300), (50, 383150), (79, 242500), (97, 197500), (100, 191575), (125, 153260), (158, 121250), (194, 98750), (250, 76630), (316, 60625), (388, 49375), (395, 48500), (485, 39500), (500, 38315), (625, 30652), (790, 24250), (970, 19750), (1250, 15326), (1580, 12125), (1940, 9875), (1975, 9700), (2425, 7900), (2500, 7663), (3950, 4850)]