21504917

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{877}}^1$

素因数の和:1028

約数の個数: 16

約数和(自身を含む): 25623552

約数和(自身を除く): 4118635

約数列:

[1, 7, 31, 113, 217, 791, 877, 3503, 6139, 24521, 27187, 99101, 190309, 693707, 3072131, 21504917]

約数ペア:

[(1, 21504917), (7, 3072131), (31, 693707), (113, 190309), (217, 99101), (791, 27187), (877, 24521), (3503, 6139)]