21167559

素因数分解:

$3^2\times 7^3\times {\mathrm{6857}}^1$

素因数の和:6884

約数の個数: 24

約数和(自身を含む): 35661600

約数和(自身を除く): 14494041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 6857, 20571, 47999, 61713, 143997, 335993, 431991, 1007979, 2351951, 3023937, 7055853, 21167559]

約数ペア:

[(1, 21167559), (3, 7055853), (7, 3023937), (9, 2351951), (21, 1007979), (49, 431991), (63, 335993), (147, 143997), (343, 61713), (441, 47999), (1029, 20571), (3087, 6857)]