21180761

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{1543}}^1$

素因数の和:1640

約数の個数: 16

約数和(自身を含む): 25346304

約数和(自身を除く): 4165543

約数列:

[1, 7, 37, 53, 259, 371, 1543, 1961, 10801, 13727, 57091, 81779, 399637, 572453, 3025823, 21180761]

約数ペア:

[(1, 21180761), (7, 3025823), (37, 572453), (53, 399637), (259, 81779), (371, 57091), (1543, 13727), (1961, 10801)]