21719745

素因数分解:

$3^4\times 5^1\times {\mathrm{53629}}^1$

素因数の和:53646

約数の個数: 20

約数和(自身を含む): 38935380

約数和(自身を除く): 17215635

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53629, 160887, 268145, 482661, 804435, 1447983, 2413305, 4343949, 7239915, 21719745]

約数ペア:

[(1, 21719745), (3, 7239915), (5, 4343949), (9, 2413305), (15, 1447983), (27, 804435), (45, 482661), (81, 268145), (135, 160887), (405, 53629)]