20407821

素因数分解:

$3^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{4933}}^1$

素因数の和:5140

約数の個数: 16

約数和(自身を含む): 31261824

約数和(自身を除く): 10854003

約数列:

[1, 3, 7, 21, 197, 591, 1379, 4137, 4933, 14799, 34531, 103593, 971801, 2915403, 6802607, 20407821]

約数ペア:

[(1, 20407821), (3, 6802607), (7, 2915403), (21, 971801), (197, 103593), (591, 34531), (1379, 14799), (4137, 4933)]