21493355

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{367}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 30046464

約数和(自身を除く): 8553109

約数列:

[1, 5, 13, 17, 53, 65, 85, 221, 265, 367, 689, 901, 1105, 1835, 3445, 4505, 4771, 6239, 11713, 19451, 23855, 31195, 58565, 81107, 97255, 252863, 330667, 405535, 1264315, 1653335, 4298671, 21493355]

約数ペア:

[(1, 21493355), (5, 4298671), (13, 1653335), (17, 1264315), (53, 405535), (65, 330667), (85, 252863), (221, 97255), (265, 81107), (367, 58565), (689, 31195), (901, 23855), (1105, 19451), (1835, 11713), (3445, 6239), (4505, 4771)]