18211739

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:219

約数の個数: 32

約数和(自身を含む): 23761920

約数和(自身を除く): 5550181

約数列:

[1, 7, 13, 29, 67, 91, 103, 203, 377, 469, 721, 871, 1339, 1943, 2639, 2987, 6097, 6901, 9373, 13601, 20909, 25259, 38831, 48307, 89713, 176813, 200129, 271817, 627991, 1400903, 2601677, 18211739]

約数ペア:

[(1, 18211739), (7, 2601677), (13, 1400903), (29, 627991), (67, 271817), (91, 200129), (103, 176813), (203, 89713), (377, 48307), (469, 38831), (721, 25259), (871, 20909), (1339, 13601), (1943, 9373), (2639, 6901), (2987, 6097)]