21210903

素因数分解:

$3^4\times 7^1\times {\mathrm{37409}}^1$

素因数の和:37428

約数の個数: 20

約数和(自身を含む): 36212880

約数和(自身を除く): 15001977

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37409, 112227, 261863, 336681, 785589, 1010043, 2356767, 3030129, 7070301, 21210903]

約数ペア:

[(1, 21210903), (3, 7070301), (7, 3030129), (9, 2356767), (21, 1010043), (27, 785589), (63, 336681), (81, 261863), (189, 112227), (567, 37409)]