21178745

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{26309}}^1$

素因数の和:26344

約数の個数: 16

約数和(自身を含む): 30309120

約数和(自身を除く): 9130375

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 26309, 131545, 184163, 605107, 920815, 3025535, 4235749, 21178745]

約数ペア:

[(1, 21178745), (5, 4235749), (7, 3025535), (23, 920815), (35, 605107), (115, 184163), (161, 131545), (805, 26309)]