21401891

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{307}}^1\times {\mathrm{433}}^1$

素因数の和:770

約数の個数: 16

約数和(自身を含む): 25665024

約数和(自身を除く): 4263133

約数列:

[1, 7, 23, 161, 307, 433, 2149, 3031, 7061, 9959, 49427, 69713, 132931, 930517, 3057413, 21401891]

約数ペア:

[(1, 21401891), (7, 3057413), (23, 930517), (161, 132931), (307, 69713), (433, 49427), (2149, 9959), (3031, 7061)]