21106071

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{107}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 36661248

約数和(自身を除く): 15555177

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 101, 107, 217, 279, 303, 321, 651, 707, 749, 909, 963, 1953, 2121, 2247, 3131, 3317, 6363, 6741, 9393, 9951, 10807, 21917, 23219, 28179, 29853, 32421, 65751, 69657, 75649, 97263, 197253, 208971, 226947, 335017, 680841, 1005051, 2345119, 3015153, 7035357, 21106071]

約数ペア:

[(1, 21106071), (3, 7035357), (7, 3015153), (9, 2345119), (21, 1005051), (31, 680841), (63, 335017), (93, 226947), (101, 208971), (107, 197253), (217, 97263), (279, 75649), (303, 69657), (321, 65751), (651, 32421), (707, 29853), (749, 28179), (909, 23219), (963, 21917), (1953, 10807), (2121, 9951), (2247, 9393), (3131, 6741), (3317, 6363)]