81138520

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{619}}^1$

素因数の和:772

約数の個数: 64

約数和(自身を含む): 190836000

約数和(自身を除く): 109697480

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 113, 116, 145, 226, 232, 290, 452, 565, 580, 619, 904, 1130, 1160, 1238, 2260, 2476, 3095, 3277, 4520, 4952, 6190, 6554, 12380, 13108, 16385, 17951, 24760, 26216, 32770, 35902, 65540, 69947, 71804, 89755, 131080, 139894, 143608, 179510, 279788, 349735, 359020, 559576, 699470, 718040, 1398940, 2028463, 2797880, 4056926, 8113852, 10142315, 16227704, 20284630, 40569260, 81138520]

約数ペア:

[(1, 81138520), (2, 40569260), (4, 20284630), (5, 16227704), (8, 10142315), (10, 8113852), (20, 4056926), (29, 2797880), (40, 2028463), (58, 1398940), (113, 718040), (116, 699470), (145, 559576), (226, 359020), (232, 349735), (290, 279788), (452, 179510), (565, 143608), (580, 139894), (619, 131080), (904, 89755), (1130, 71804), (1160, 69947), (1238, 65540), (2260, 35902), (2476, 32770), (3095, 26216), (3277, 24760), (4520, 17951), (4952, 16385), (6190, 13108), (6554, 12380)]