21261639

素因数分解:

$3^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2729}}^1$

素因数の和:2799

約数の個数: 24

約数和(自身を含む): 33611760

約数和(自身を除く): 12350121

約数列:

[1, 3, 7, 21, 49, 53, 147, 159, 371, 1113, 2597, 2729, 7791, 8187, 19103, 57309, 133721, 144637, 401163, 433911, 1012459, 3037377, 7087213, 21261639]

約数ペア:

[(1, 21261639), (3, 7087213), (7, 3037377), (21, 1012459), (49, 433911), (53, 401163), (147, 144637), (159, 133721), (371, 57309), (1113, 19103), (2597, 8187), (2729, 7791)]