21126909

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{1181}}^1$

素因数の和:1340

約数の個数: 16

約数和(自身を含む): 28935360

約数和(自身を除く): 7808451

約数列:

[1, 3, 67, 89, 201, 267, 1181, 3543, 5963, 17889, 79127, 105109, 237381, 315327, 7042303, 21126909]

約数ペア:

[(1, 21126909), (3, 7042303), (67, 315327), (89, 237381), (201, 105109), (267, 79127), (1181, 17889), (3543, 5963)]