18421221

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67477}}^1$

素因数の和:67500

約数の個数: 16

約数和(自身を含む): 30230144

約数和(自身を除く): 11808923

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 67477, 202431, 472339, 877201, 1417017, 2631603, 6140407, 18421221]

約数ペア:

[(1, 18421221), (3, 6140407), (7, 2631603), (13, 1417017), (21, 877201), (39, 472339), (91, 202431), (273, 67477)]