21791399

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{1229}}^1$

素因数の和:1402

約数の個数: 16

約数和(自身を含む): 26568000

約数和(自身を除く): 4776601

約数列:

[1, 7, 17, 119, 149, 1043, 1229, 2533, 8603, 17731, 20893, 146251, 183121, 1281847, 3113057, 21791399]

約数ペア:

[(1, 21791399), (7, 3113057), (17, 1281847), (119, 183121), (149, 146251), (1043, 20893), (1229, 17731), (2533, 8603)]