21396789

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{1447}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 32527872

約数和(自身を除く): 11131083

約数列:

[1, 3, 9, 31, 53, 93, 159, 279, 477, 1447, 1643, 4341, 4929, 13023, 14787, 44857, 76691, 134571, 230073, 403713, 690219, 2377421, 7132263, 21396789]

約数ペア:

[(1, 21396789), (3, 7132263), (9, 2377421), (31, 690219), (53, 403713), (93, 230073), (159, 134571), (279, 76691), (477, 44857), (1447, 14787), (1643, 13023), (4341, 4929)]