21000887949

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{1871}}^1\times {\mathrm{87011}}^1$

素因数の和:88928

約数の個数: 16

約数和(自身を含む): 28668017664

約数和(自身を除く): 7667129715

約数列:

[1, 3, 43, 129, 1871, 5613, 80453, 87011, 241359, 261033, 3741473, 11224419, 162797581, 488392743, 7000295983, 21000887949]

約数ペア:

[(1, 21000887949), (3, 7000295983), (43, 488392743), (129, 162797581), (1871, 11224419), (5613, 3741473), (80453, 261033), (87011, 241359)]