21319955

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{6779}}^1$

素因数の和:6838

約数の個数: 16

約数和(自身を含む): 27825120

約数和(自身を除く): 6505165

約数列:

[1, 5, 17, 37, 85, 185, 629, 3145, 6779, 33895, 115243, 250823, 576215, 1254115, 4263991, 21319955]

約数ペア:

[(1, 21319955), (5, 4263991), (17, 1254115), (37, 576215), (85, 250823), (185, 115243), (629, 33895), (3145, 6779)]