21795561

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{5077}}^1$

素因数の和:5142

約数の個数: 20

約数和(自身を含む): 33179652

約数和(自身を除く): 11384091

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 5077, 15231, 45693, 137079, 269081, 411237, 807243, 2421729, 7265187, 21795561]

約数ペア:

[(1, 21795561), (3, 7265187), (9, 2421729), (27, 807243), (53, 411237), (81, 269081), (159, 137079), (477, 45693), (1431, 15231), (4293, 5077)]