21688443

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{18119}}^1$

素因数の和:18151

約数の個数: 24

約数和(自身を含む): 37689600

約数和(自身を除く): 16001157

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 18119, 54357, 126833, 163071, 344261, 380499, 1032783, 1141497, 2409827, 3098349, 7229481, 21688443]

約数ペア:

[(1, 21688443), (3, 7229481), (7, 3098349), (9, 2409827), (19, 1141497), (21, 1032783), (57, 380499), (63, 344261), (133, 163071), (171, 126833), (399, 54357), (1197, 18119)]