21348975

素因数分解:

$3^1\times 5^2\times {\mathrm{281}}^1\times {\mathrm{1013}}^1$

素因数の和:1307

約数の個数: 24

約数和(自身を含む): 35457552

約数和(自身を除く): 14108577

約数列:

[1, 3, 5, 15, 25, 75, 281, 843, 1013, 1405, 3039, 4215, 5065, 7025, 15195, 21075, 25325, 75975, 284653, 853959, 1423265, 4269795, 7116325, 21348975]

約数ペア:

[(1, 21348975), (3, 7116325), (5, 4269795), (15, 1423265), (25, 853959), (75, 284653), (281, 75975), (843, 25325), (1013, 21075), (1405, 15195), (3039, 7025), (4215, 5065)]