21686169

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:257

約数の個数: 32

約数和(自身を含む): 31912704

約数和(自身を除く): 10226535

約数列:

[1, 3, 17, 51, 53, 71, 113, 159, 213, 339, 901, 1207, 1921, 2703, 3621, 3763, 5763, 5989, 8023, 11289, 17967, 24069, 63971, 101813, 136391, 191913, 305439, 409173, 425219, 1275657, 7228723, 21686169]

約数ペア:

[(1, 21686169), (3, 7228723), (17, 1275657), (51, 425219), (53, 409173), (71, 305439), (113, 191913), (159, 136391), (213, 101813), (339, 63971), (901, 24069), (1207, 17967), (1921, 11289), (2703, 8023), (3621, 5989), (3763, 5763)]