21538278

素因数分解:

$2^1\times 3^3\times {\mathrm{398857}}^1$

素因数の和:398868

約数の個数: 16

約数和(自身を含む): 47862960

約数和(自身を除く): 26324682

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 398857, 797714, 1196571, 2393142, 3589713, 7179426, 10769139, 21538278]

約数ペア:

[(1, 21538278), (2, 10769139), (3, 7179426), (6, 3589713), (9, 2393142), (18, 1196571), (27, 797714), (54, 398857)]