21262479

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{131}}^2$

素因数の和:331

約数の個数: 24

約数和(自身を含む): 33202560

約数和(自身を除く): 11940081

約数列:

[1, 3, 7, 21, 59, 131, 177, 393, 413, 917, 1239, 2751, 7729, 17161, 23187, 51483, 54103, 120127, 162309, 360381, 1012499, 3037497, 7087493, 21262479]

約数ペア:

[(1, 21262479), (3, 7087493), (7, 3037497), (21, 1012499), (59, 360381), (131, 162309), (177, 120127), (393, 54103), (413, 51483), (917, 23187), (1239, 17161), (2751, 7729)]