21199997

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1447}}^1$

素因数の和:1497

約数の個数: 24

約数和(自身を含む): 27732096

約数和(自身を除く): 6532099

約数列:

[1, 7, 13, 23, 49, 91, 161, 299, 637, 1127, 1447, 2093, 10129, 14651, 18811, 33281, 70903, 131677, 232967, 432653, 921739, 1630769, 3028571, 21199997]

約数ペア:

[(1, 21199997), (7, 3028571), (13, 1630769), (23, 921739), (49, 432653), (91, 232967), (161, 131677), (299, 70903), (637, 33281), (1127, 18811), (1447, 14651), (2093, 10129)]