21231657

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{919}}^1$

素因数の和:1093

約数の個数: 24

約数和(自身を含む): 32722560

約数和(自身を除く): 11490903

約数列:

[1, 3, 9, 17, 51, 151, 153, 453, 919, 1359, 2567, 2757, 7701, 8271, 15623, 23103, 46869, 138769, 140607, 416307, 1248921, 2359073, 7077219, 21231657]

約数ペア:

[(1, 21231657), (3, 7077219), (9, 2359073), (17, 1248921), (51, 416307), (151, 140607), (153, 138769), (453, 46869), (919, 23103), (1359, 15623), (2567, 8271), (2757, 7701)]