491891000

素因数分解:

$2^3\times 5^3\times {\mathrm{19}}^1\times {\mathrm{25889}}^1$

素因数の和:25929

約数の個数: 64

約数和(自身を含む): 1211652000

約数和(自身を除く): 719761000

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 125, 152, 190, 200, 250, 380, 475, 500, 760, 950, 1000, 1900, 2375, 3800, 4750, 9500, 19000, 25889, 51778, 103556, 129445, 207112, 258890, 491891, 517780, 647225, 983782, 1035560, 1294450, 1967564, 2459455, 2588900, 3236125, 3935128, 4918910, 5177800, 6472250, 9837820, 12297275, 12944500, 19675640, 24594550, 25889000, 49189100, 61486375, 98378200, 122972750, 245945500, 491891000]

約数ペア:

[(1, 491891000), (2, 245945500), (4, 122972750), (5, 98378200), (8, 61486375), (10, 49189100), (19, 25889000), (20, 24594550), (25, 19675640), (38, 12944500), (40, 12297275), (50, 9837820), (76, 6472250), (95, 5177800), (100, 4918910), (125, 3935128), (152, 3236125), (190, 2588900), (200, 2459455), (250, 1967564), (380, 1294450), (475, 1035560), (500, 983782), (760, 647225), (950, 517780), (1000, 491891), (1900, 258890), (2375, 207112), (3800, 129445), (4750, 103556), (9500, 51778), (19000, 25889)]