19967500

素因数分解:

$2^2\times 5^4\times 7^2\times {\mathrm{163}}^1$

素因数の和:201

約数の個数: 90

約数和(自身を含む): 51105516

約数和(自身を除く): 31138016

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 125, 140, 163, 175, 196, 245, 250, 326, 350, 490, 500, 625, 652, 700, 815, 875, 980, 1141, 1225, 1250, 1630, 1750, 2282, 2450, 2500, 3260, 3500, 4075, 4375, 4564, 4900, 5705, 6125, 7987, 8150, 8750, 11410, 12250, 15974, 16300, 17500, 20375, 22820, 24500, 28525, 30625, 31948, 39935, 40750, 57050, 61250, 79870, 81500, 101875, 114100, 122500, 142625, 159740, 199675, 203750, 285250, 399350, 407500, 570500, 713125, 798700, 998375, 1426250, 1996750, 2852500, 3993500, 4991875, 9983750, 19967500]

約数ペア:

[(1, 19967500), (2, 9983750), (4, 4991875), (5, 3993500), (7, 2852500), (10, 1996750), (14, 1426250), (20, 998375), (25, 798700), (28, 713125), (35, 570500), (49, 407500), (50, 399350), (70, 285250), (98, 203750), (100, 199675), (125, 159740), (140, 142625), (163, 122500), (175, 114100), (196, 101875), (245, 81500), (250, 79870), (326, 61250), (350, 57050), (490, 40750), (500, 39935), (625, 31948), (652, 30625), (700, 28525), (815, 24500), (875, 22820), (980, 20375), (1141, 17500), (1225, 16300), (1250, 15974), (1630, 12250), (1750, 11410), (2282, 8750), (2450, 8150), (2500, 7987), (3260, 6125), (3500, 5705), (4075, 4900), (4375, 4564)]