21239535

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^2\times {\mathrm{641}}^1$

素因数の和:743

約数の個数: 24

約数和(自身を含む): 34775856

約数和(自身を除く): 13536321

約数列:

[1, 3, 5, 15, 47, 141, 235, 641, 705, 1923, 2209, 3205, 6627, 9615, 11045, 30127, 33135, 90381, 150635, 451905, 1415969, 4247907, 7079845, 21239535]

約数ペア:

[(1, 21239535), (3, 7079845), (5, 4247907), (15, 1415969), (47, 451905), (141, 150635), (235, 90381), (641, 33135), (705, 30127), (1923, 11045), (2209, 9615), (3205, 6627)]