20398985

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{1201}}^1$

素因数の和:1328

約数の個数: 16

約数和(自身を含む): 25386240

約数和(自身を除く): 4987255

約数列:

[1, 5, 43, 79, 215, 395, 1201, 3397, 6005, 16985, 51643, 94879, 258215, 474395, 4079797, 20398985]

約数ペア:

[(1, 20398985), (5, 4079797), (43, 474395), (79, 258215), (215, 94879), (395, 51643), (1201, 16985), (3397, 6005)]