21897855

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9931}}^1$

素因数の和:9956

約数の個数: 36

約数和(自身を含む): 44157672

約数和(自身を除く): 22259817

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9931, 29793, 49655, 69517, 89379, 148965, 208551, 347585, 446895, 486619, 625653, 1042755, 1459857, 2433095, 3128265, 4379571, 7299285, 21897855]

約数ペア:

[(1, 21897855), (3, 7299285), (5, 4379571), (7, 3128265), (9, 2433095), (15, 1459857), (21, 1042755), (35, 625653), (45, 486619), (49, 446895), (63, 347585), (105, 208551), (147, 148965), (245, 89379), (315, 69517), (441, 49655), (735, 29793), (2205, 9931)]