21005727

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{419}}^1\times {\mathrm{983}}^1$

素因数の和:1422

約数の個数: 16

約数和(自身を含む): 29756160

約数和(自身を除く): 8750433

約数列:

[1, 3, 17, 51, 419, 983, 1257, 2949, 7123, 16711, 21369, 50133, 411877, 1235631, 7001909, 21005727]

約数ペア:

[(1, 21005727), (3, 7001909), (17, 1235631), (51, 411877), (419, 50133), (983, 21369), (1257, 16711), (2949, 7123)]