21169975

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{419}}^1$

素因数の和:519

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 6328265

約数列:

[1, 5, 25, 43, 47, 215, 235, 419, 1075, 1175, 2021, 2095, 10105, 10475, 18017, 19693, 50525, 90085, 98465, 450425, 492325, 846799, 4233995, 21169975]

約数ペア:

[(1, 21169975), (5, 4233995), (25, 846799), (43, 492325), (47, 450425), (215, 98465), (235, 90085), (419, 50525), (1075, 19693), (1175, 18017), (2021, 10475), (2095, 10105)]