21690837

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{18121}}^1$

素因数の和:18153

約数の個数: 24

約数和(自身を含む): 37693760

約数和(自身を除く): 16002923

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 18121, 54363, 126847, 163089, 344299, 380541, 1032897, 1141623, 2410093, 3098691, 7230279, 21690837]

約数ペア:

[(1, 21690837), (3, 7230279), (7, 3098691), (9, 2410093), (19, 1141623), (21, 1032897), (57, 380541), (63, 344299), (133, 163089), (171, 126847), (399, 54363), (1197, 18121)]