21237489

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{25931}}^1$

素因数の和:25957

約数の個数: 24

約数和(自身を含む): 37756992

約数和(自身を除く): 16519503

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 25931, 77793, 181517, 233379, 337103, 544551, 1011309, 1633653, 2359721, 3033927, 7079163, 21237489]

約数ペア:

[(1, 21237489), (3, 7079163), (7, 3033927), (9, 2359721), (13, 1633653), (21, 1011309), (39, 544551), (63, 337103), (91, 233379), (117, 181517), (273, 77793), (819, 25931)]