21385329

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^2\times {\mathrm{461}}^1$

素因数の和:565

約数の個数: 24

約数和(自身を含む): 33367488

約数和(自身を除く): 11982159

約数列:

[1, 3, 7, 21, 47, 141, 329, 461, 987, 1383, 2209, 3227, 6627, 9681, 15463, 21667, 46389, 65001, 151669, 455007, 1018349, 3055047, 7128443, 21385329]

約数ペア:

[(1, 21385329), (3, 7128443), (7, 3055047), (21, 1018349), (47, 455007), (141, 151669), (329, 65001), (461, 46389), (987, 21667), (1383, 15463), (2209, 9681), (3227, 6627)]