21621681

素因数分解:

$3^3\times {\mathrm{131}}^1\times {\mathrm{6113}}^1$

素因数の和:6253

約数の個数: 16

約数和(自身を含む): 32281920

約数和(自身を除く): 10660239

約数列:

[1, 3, 9, 27, 131, 393, 1179, 3537, 6113, 18339, 55017, 165051, 800803, 2402409, 7207227, 21621681]

約数ペア:

[(1, 21621681), (3, 7207227), (9, 2402409), (27, 800803), (131, 165051), (393, 55017), (1179, 18339), (3537, 6113)]