21739851

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5657}}^1$

素因数の和:5731

約数の個数: 24

約数和(自身を含む): 36482784

約数和(自身を除く): 14742933

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5657, 16971, 39599, 50913, 118797, 345077, 356391, 1035231, 2415539, 3105693, 7246617, 21739851]

約数ペア:

[(1, 21739851), (3, 7246617), (7, 3105693), (9, 2415539), (21, 1035231), (61, 356391), (63, 345077), (183, 118797), (427, 50913), (549, 39599), (1281, 16971), (3843, 5657)]