21407210

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{2741}}^1$

素因数の和:2830

約数の個数: 32

約数和(自身を含む): 42643584

約数和(自身を除く): 21236374

約数列:

[1, 2, 5, 10, 11, 22, 55, 71, 110, 142, 355, 710, 781, 1562, 2741, 3905, 5482, 7810, 13705, 27410, 30151, 60302, 150755, 194611, 301510, 389222, 973055, 1946110, 2140721, 4281442, 10703605, 21407210]

約数ペア:

[(1, 21407210), (2, 10703605), (5, 4281442), (10, 2140721), (11, 1946110), (22, 973055), (55, 389222), (71, 301510), (110, 194611), (142, 150755), (355, 60302), (710, 30151), (781, 27410), (1562, 13705), (2741, 7810), (3905, 5482)]