218212813

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{751}}^1$

素因数の和:905

約数の個数: 32

約数和(自身を含む): 280297472

約数和(自身を除く): 62084659

約数列:

[1, 7, 13, 31, 91, 103, 217, 403, 721, 751, 1339, 2821, 3193, 5257, 9373, 9763, 22351, 23281, 41509, 68341, 77353, 162967, 290563, 302653, 541471, 1005589, 2118571, 2397943, 7039123, 16785601, 31173259, 218212813]

約数ペア:

[(1, 218212813), (7, 31173259), (13, 16785601), (31, 7039123), (91, 2397943), (103, 2118571), (217, 1005589), (403, 541471), (721, 302653), (751, 290563), (1339, 162967), (2821, 77353), (3193, 68341), (5257, 41509), (9373, 23281), (9763, 22351)]