21267855

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{631}}^1$

素因数の和:756

約数の個数: 48

約数和(自身を含む): 42591744

約数和(自身を除く): 21323889

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 107, 315, 321, 535, 631, 749, 963, 1605, 1893, 2247, 3155, 3745, 4417, 4815, 5679, 6741, 9465, 11235, 13251, 22085, 28395, 33705, 39753, 66255, 67517, 198765, 202551, 337585, 472619, 607653, 1012755, 1417857, 2363095, 3038265, 4253571, 7089285, 21267855]

約数ペア:

[(1, 21267855), (3, 7089285), (5, 4253571), (7, 3038265), (9, 2363095), (15, 1417857), (21, 1012755), (35, 607653), (45, 472619), (63, 337585), (105, 202551), (107, 198765), (315, 67517), (321, 66255), (535, 39753), (631, 33705), (749, 28395), (963, 22085), (1605, 13251), (1893, 11235), (2247, 9465), (3155, 6741), (3745, 5679), (4417, 4815)]