21497217

素因数分解:

$3^1\times 7^1\times {\mathrm{641}}^1\times {\mathrm{1597}}^1$

素因数の和:2248

約数の個数: 16

約数和(自身を含む): 32829312

約数和(自身を除く): 11332095

約数列:

[1, 3, 7, 21, 641, 1597, 1923, 4487, 4791, 11179, 13461, 33537, 1023677, 3071031, 7165739, 21497217]

約数ペア:

[(1, 21497217), (3, 7165739), (7, 3071031), (21, 1023677), (641, 33537), (1597, 13461), (1923, 11179), (4487, 4791)]