18853821

素因数分解:

$3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2153}}^1$

素因数の和:2305

約数の個数: 24

約数和(自身を含む): 31362240

約数和(自身を除く): 12508419

約数列:

[1, 3, 7, 9, 21, 63, 139, 417, 973, 1251, 2153, 2919, 6459, 8757, 15071, 19377, 45213, 135639, 299267, 897801, 2094869, 2693403, 6284607, 18853821]

約数ペア:

[(1, 18853821), (3, 6284607), (7, 2693403), (9, 2094869), (21, 897801), (63, 299267), (139, 135639), (417, 45213), (973, 19377), (1251, 15071), (2153, 8757), (2919, 6459)]