80972500

素因数分解:

$2^2\times 5^4\times 7^2\times {\mathrm{661}}^1$

素因数の和:699

約数の個数: 90

約数和(自身を含む): 206291778

約数和(自身を除く): 125319278

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 125, 140, 175, 196, 245, 250, 350, 490, 500, 625, 661, 700, 875, 980, 1225, 1250, 1322, 1750, 2450, 2500, 2644, 3305, 3500, 4375, 4627, 4900, 6125, 6610, 8750, 9254, 12250, 13220, 16525, 17500, 18508, 23135, 24500, 30625, 32389, 33050, 46270, 61250, 64778, 66100, 82625, 92540, 115675, 122500, 129556, 161945, 165250, 231350, 323890, 330500, 413125, 462700, 578375, 647780, 809725, 826250, 1156750, 1619450, 1652500, 2313500, 2891875, 3238900, 4048625, 5783750, 8097250, 11567500, 16194500, 20243125, 40486250, 80972500]

約数ペア:

[(1, 80972500), (2, 40486250), (4, 20243125), (5, 16194500), (7, 11567500), (10, 8097250), (14, 5783750), (20, 4048625), (25, 3238900), (28, 2891875), (35, 2313500), (49, 1652500), (50, 1619450), (70, 1156750), (98, 826250), (100, 809725), (125, 647780), (140, 578375), (175, 462700), (196, 413125), (245, 330500), (250, 323890), (350, 231350), (490, 165250), (500, 161945), (625, 129556), (661, 122500), (700, 115675), (875, 92540), (980, 82625), (1225, 66100), (1250, 64778), (1322, 61250), (1750, 46270), (2450, 33050), (2500, 32389), (2644, 30625), (3305, 24500), (3500, 23135), (4375, 18508), (4627, 17500), (4900, 16525), (6125, 13220), (6610, 12250), (8750, 9254)]