217877079

素因数分解:

$3^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{10663}}^1$

素因数の和:10819

約数の個数: 24

約数和(自身を含む): 340394880

約数和(自身を除く): 122517801

約数列:

[1, 3, 7, 21, 49, 139, 147, 417, 973, 2919, 6811, 10663, 20433, 31989, 74641, 223923, 522487, 1482157, 1567461, 4446471, 10375099, 31125297, 72625693, 217877079]

約数ペア:

[(1, 217877079), (3, 72625693), (7, 31125297), (21, 10375099), (49, 4446471), (139, 1567461), (147, 1482157), (417, 522487), (973, 223923), (2919, 74641), (6811, 31989), (10663, 20433)]