21307420

素因数分解:

$2^2\times 5^1\times {\mathrm{461}}^1\times {\mathrm{2311}}^1$

素因数の和:2781

約数の個数: 24

約数和(自身を含む): 44862048

約数和(自身を除く): 23554628

約数列:

[1, 2, 4, 5, 10, 20, 461, 922, 1844, 2305, 2311, 4610, 4622, 9220, 9244, 11555, 23110, 46220, 1065371, 2130742, 4261484, 5326855, 10653710, 21307420]

約数ペア:

[(1, 21307420), (2, 10653710), (4, 5326855), (5, 4261484), (10, 2130742), (20, 1065371), (461, 46220), (922, 23110), (1844, 11555), (2305, 9244), (2311, 9220), (4610, 4622)]