21241978

素因数分解:

$2^1\times {\mathrm{29}}^2\times {\mathrm{73}}^1\times {\mathrm{173}}^1$

素因数の和:306

約数の個数: 24

約数和(自身を含む): 33644988

約数和(自身を除く): 12403010

約数列:

[1, 2, 29, 58, 73, 146, 173, 346, 841, 1682, 2117, 4234, 5017, 10034, 12629, 25258, 61393, 122786, 145493, 290986, 366241, 732482, 10620989, 21241978]

約数ペア:

[(1, 21241978), (2, 10620989), (29, 732482), (58, 366241), (73, 290986), (146, 145493), (173, 122786), (346, 61393), (841, 25258), (1682, 12629), (2117, 10034), (4234, 5017)]