21267540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16879}}^1$

素因数の和:16901

約数の個数: 72

約数和(自身を含む): 73731840

約数和(自身を除く): 52464300

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16879, 33758, 50637, 67516, 84395, 101274, 118153, 151911, 168790, 202548, 236306, 253185, 303822, 337580, 354459, 472612, 506370, 590765, 607644, 708918, 759555, 1012740, 1063377, 1181530, 1417836, 1519110, 1772295, 2126754, 2363060, 3038220, 3544590, 4253508, 5316885, 7089180, 10633770, 21267540]

約数ペア:

[(1, 21267540), (2, 10633770), (3, 7089180), (4, 5316885), (5, 4253508), (6, 3544590), (7, 3038220), (9, 2363060), (10, 2126754), (12, 1772295), (14, 1519110), (15, 1417836), (18, 1181530), (20, 1063377), (21, 1012740), (28, 759555), (30, 708918), (35, 607644), (36, 590765), (42, 506370), (45, 472612), (60, 354459), (63, 337580), (70, 303822), (84, 253185), (90, 236306), (105, 202548), (126, 168790), (140, 151911), (180, 118153), (210, 101274), (252, 84395), (315, 67516), (420, 50637), (630, 33758), (1260, 16879)]