21705164

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 42674688

約数和(自身を除く): 20969524

約数列:

[1, 2, 4, 13, 26, 47, 52, 83, 94, 107, 166, 188, 214, 332, 428, 611, 1079, 1222, 1391, 2158, 2444, 2782, 3901, 4316, 5029, 5564, 7802, 8881, 10058, 15604, 17762, 20116, 35524, 50713, 65377, 101426, 115453, 130754, 202852, 230906, 261508, 417407, 461812, 834814, 1669628, 5426291, 10852582, 21705164]

約数ペア:

[(1, 21705164), (2, 10852582), (4, 5426291), (13, 1669628), (26, 834814), (47, 461812), (52, 417407), (83, 261508), (94, 230906), (107, 202852), (166, 130754), (188, 115453), (214, 101426), (332, 65377), (428, 50713), (611, 35524), (1079, 20116), (1222, 17762), (1391, 15604), (2158, 10058), (2444, 8881), (2782, 7802), (3901, 5564), (4316, 5029)]