21279420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{118219}}^1$

素因数の和:118234

約数の個数: 36

約数和(自身を含む): 64548120

約数和(自身を除く): 43268700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 118219, 236438, 354657, 472876, 591095, 709314, 1063971, 1182190, 1418628, 1773285, 2127942, 2364380, 3546570, 4255884, 5319855, 7093140, 10639710, 21279420]

約数ペア:

[(1, 21279420), (2, 10639710), (3, 7093140), (4, 5319855), (5, 4255884), (6, 3546570), (9, 2364380), (10, 2127942), (12, 1773285), (15, 1418628), (18, 1182190), (20, 1063971), (30, 709314), (36, 591095), (45, 472876), (60, 354657), (90, 236438), (180, 118219)]