21652821

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{3607}}^1$

素因数の和:3665

約数の個数: 24

約数和(自身を含む): 33770880

約数和(自身を除く): 12118059

約数列:

[1, 3, 9, 23, 29, 69, 87, 207, 261, 667, 2001, 3607, 6003, 10821, 32463, 82961, 104603, 248883, 313809, 746649, 941427, 2405869, 7217607, 21652821]

約数ペア:

[(1, 21652821), (3, 7217607), (9, 2405869), (23, 941427), (29, 746649), (69, 313809), (87, 248883), (207, 104603), (261, 82961), (667, 32463), (2001, 10821), (3607, 6003)]