18784521

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{5231}}^1$

素因数の和:5266

約数の個数: 32

約数和(自身を含む): 33484800

約数和(自身を除く): 14700279

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 133, 171, 189, 399, 513, 1197, 3591, 5231, 15693, 36617, 47079, 99389, 109851, 141237, 298167, 329553, 695723, 894501, 988659, 2087169, 2683503, 6261507, 18784521]

約数ペア:

[(1, 18784521), (3, 6261507), (7, 2683503), (9, 2087169), (19, 988659), (21, 894501), (27, 695723), (57, 329553), (63, 298167), (133, 141237), (171, 109851), (189, 99389), (399, 47079), (513, 36617), (1197, 15693), (3591, 5231)]