81217880

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{43201}}^1$

素因数の和:43259

約数の個数: 32

約数和(自身を含む): 186632640

約数和(自身を除く): 105414760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 43201, 86402, 172804, 216005, 345608, 432010, 864020, 1728040, 2030447, 4060894, 8121788, 10152235, 16243576, 20304470, 40608940, 81217880]

約数ペア:

[(1, 81217880), (2, 40608940), (4, 20304470), (5, 16243576), (8, 10152235), (10, 8121788), (20, 4060894), (40, 2030447), (47, 1728040), (94, 864020), (188, 432010), (235, 345608), (376, 216005), (470, 172804), (940, 86402), (1880, 43201)]