21538521

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{25733}}^1$

素因数の和:25773

約数の個数: 16

約数和(自身を含む): 32939520

約数和(自身を除く): 11400999

約数列:

[1, 3, 9, 27, 31, 93, 279, 837, 25733, 77199, 231597, 694791, 797723, 2393169, 7179507, 21538521]

約数ペア:

[(1, 21538521), (3, 7179507), (9, 2393169), (27, 797723), (31, 694791), (93, 231597), (279, 77199), (837, 25733)]