21451000

素因数分解:

$2^3\times 5^3\times {\mathrm{19}}^1\times {\mathrm{1129}}^1$

素因数の和:1169

約数の個数: 64

約数和(自身を含む): 52884000

約数和(自身を除く): 31433000

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, 1129, 1900, 2258, 2375, 3800, 4516, 4750, 5645, 9032, 9500, 11290, 19000, 21451, 22580, 28225, 42902, 45160, 56450, 85804, 107255, 112900, 141125, 171608, 214510, 225800, 282250, 429020, 536275, 564500, 858040, 1072550, 1129000, 2145100, 2681375, 4290200, 5362750, 10725500, 21451000]

約数ペア:

[(1, 21451000), (2, 10725500), (4, 5362750), (5, 4290200), (8, 2681375), (10, 2145100), (19, 1129000), (20, 1072550), (25, 858040), (38, 564500), (40, 536275), (50, 429020), (76, 282250), (95, 225800), (100, 214510), (125, 171608), (152, 141125), (190, 112900), (200, 107255), (250, 85804), (380, 56450), (475, 45160), (500, 42902), (760, 28225), (950, 22580), (1000, 21451), (1129, 19000), (1900, 11290), (2258, 9500), (2375, 9032), (3800, 5645), (4516, 4750)]