21091786

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{131}}^1\times {\mathrm{223}}^1$

素因数の和:394

約数の個数: 24

約数和(自身を含む): 33796224

約数和(自身を除く): 12704438

約数列:

[1, 2, 19, 38, 131, 223, 262, 361, 446, 722, 2489, 4237, 4978, 8474, 29213, 47291, 58426, 80503, 94582, 161006, 555047, 1110094, 10545893, 21091786]

約数ペア:

[(1, 21091786), (2, 10545893), (19, 1110094), (38, 555047), (131, 161006), (223, 94582), (262, 80503), (361, 58426), (446, 47291), (722, 29213), (2489, 8474), (4237, 4978)]