209905917

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1\times {\mathrm{587}}^1$

素因数の和:829

約数の個数: 32

約数和(自身を含む): 309391488

約数和(自身を除く): 99485571

約数列:

[1, 3, 13, 39, 53, 159, 173, 519, 587, 689, 1761, 2067, 2249, 6747, 7631, 9169, 22893, 27507, 31111, 93333, 101551, 119197, 304653, 357591, 404443, 1213329, 1320163, 3960489, 5382203, 16146609, 69968639, 209905917]

約数ペア:

[(1, 209905917), (3, 69968639), (13, 16146609), (39, 5382203), (53, 3960489), (159, 1320163), (173, 1213329), (519, 404443), (587, 357591), (689, 304653), (1761, 119197), (2067, 101551), (2249, 93333), (6747, 31111), (7631, 27507), (9169, 22893)]