19780015

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{3449}}^1$

素因数の和:3522

約数の個数: 16

約数和(自身を含む): 25171200

約数和(自身を除く): 5391185

約数列:

[1, 5, 31, 37, 155, 185, 1147, 3449, 5735, 17245, 106919, 127613, 534595, 638065, 3956003, 19780015]

約数ペア:

[(1, 19780015), (5, 3956003), (31, 638065), (37, 534595), (155, 127613), (185, 106919), (1147, 17245), (3449, 5735)]