21505918

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{829}}^1$

素因数の和:964

約数の個数: 32

約数和(自身を含む): 39441600

約数和(自身を除く): 17935682

約数列:

[1, 2, 7, 14, 17, 34, 109, 119, 218, 238, 763, 829, 1526, 1658, 1853, 3706, 5803, 11606, 12971, 14093, 25942, 28186, 90361, 98651, 180722, 197302, 632527, 1265054, 1536137, 3072274, 10752959, 21505918]

約数ペア:

[(1, 21505918), (2, 10752959), (7, 3072274), (14, 1536137), (17, 1265054), (34, 632527), (109, 197302), (119, 180722), (218, 98651), (238, 90361), (763, 28186), (829, 25942), (1526, 14093), (1658, 12971), (1853, 11606), (3706, 5803)]