21540029

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{337}}^1\times {\mathrm{397}}^1$

素因数の和:764

約数の個数: 16

約数和(自身を含む): 25828608

約数和(自身を除く): 4288579

約数列:

[1, 7, 23, 161, 337, 397, 2359, 2779, 7751, 9131, 54257, 63917, 133789, 936523, 3077147, 21540029]

約数ペア:

[(1, 21540029), (7, 3077147), (23, 936523), (161, 133789), (337, 63917), (397, 54257), (2359, 9131), (2779, 7751)]