217185891

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{179}}^1\times {\mathrm{587}}^1$

素因数の和:835

約数の個数: 32

約数和(自身を含む): 320060160

約数和(自身を除く): 102874269

約数列:

[1, 3, 13, 39, 53, 159, 179, 537, 587, 689, 1761, 2067, 2327, 6981, 7631, 9487, 22893, 28461, 31111, 93333, 105073, 123331, 315219, 369993, 404443, 1213329, 1365949, 4097847, 5568869, 16706607, 72395297, 217185891]

約数ペア:

[(1, 217185891), (3, 72395297), (13, 16706607), (39, 5568869), (53, 4097847), (159, 1365949), (179, 1213329), (537, 404443), (587, 369993), (689, 315219), (1761, 123331), (2067, 105073), (2327, 93333), (6981, 31111), (7631, 28461), (9487, 22893)]