21043790

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{123787}}^1$

素因数の和:123811

約数の個数: 16

約数和(自身を含む): 40107312

約数和(自身を除く): 19063522

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 123787, 247574, 618935, 1237870, 2104379, 4208758, 10521895, 21043790]

約数ペア:

[(1, 21043790), (2, 10521895), (5, 4208758), (10, 2104379), (17, 1237870), (34, 618935), (85, 247574), (170, 123787)]