21664851

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{797}}^1$

素因数の和:871

約数の個数: 32

約数和(自身を含む): 33784128

約数和(自身を除く): 12119277

約数列:

[1, 3, 13, 17, 39, 41, 51, 123, 221, 533, 663, 697, 797, 1599, 2091, 2391, 9061, 10361, 13549, 27183, 31083, 32677, 40647, 98031, 176137, 424801, 528411, 555509, 1274403, 1666527, 7221617, 21664851]

約数ペア:

[(1, 21664851), (3, 7221617), (13, 1666527), (17, 1274403), (39, 555509), (41, 528411), (51, 424801), (123, 176137), (221, 98031), (533, 40647), (663, 32677), (697, 31083), (797, 27183), (1599, 13549), (2091, 10361), (2391, 9061)]