21507381

素因数分解:

$3^2\times 7^1\times {\mathrm{487}}^1\times {\mathrm{701}}^1$

素因数の和:1201

約数の個数: 24

約数和(自身を含む): 35627904

約数和(自身を除く): 14120523

約数列:

[1, 3, 7, 9, 21, 63, 487, 701, 1461, 2103, 3409, 4383, 4907, 6309, 10227, 14721, 30681, 44163, 341387, 1024161, 2389709, 3072483, 7169127, 21507381]

約数ペア:

[(1, 21507381), (3, 7169127), (7, 3072483), (9, 2389709), (21, 1024161), (63, 341387), (487, 44163), (701, 30681), (1461, 14721), (2103, 10227), (3409, 6309), (4383, 4907)]