20891439

素因数分解:

$3^5\times {\mathrm{149}}^1\times {\mathrm{577}}^1$

素因数の和:741

約数の個数: 24

約数和(自身を含む): 31558800

約数和(自身を除く): 10667361

約数列:

[1, 3, 9, 27, 81, 149, 243, 447, 577, 1341, 1731, 4023, 5193, 12069, 15579, 36207, 46737, 85973, 140211, 257919, 773757, 2321271, 6963813, 20891439]

約数ペア:

[(1, 20891439), (3, 6963813), (9, 2321271), (27, 773757), (81, 257919), (149, 140211), (243, 85973), (447, 46737), (577, 36207), (1341, 15579), (1731, 12069), (4023, 5193)]