21006747

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:200

約数の個数: 48

約数和(自身を含む): 34265088

約数和(自身を除く): 13258341

約数列:

[1, 3, 9, 17, 31, 43, 51, 93, 103, 129, 153, 279, 309, 387, 527, 731, 927, 1333, 1581, 1751, 2193, 3193, 3999, 4429, 4743, 5253, 6579, 9579, 11997, 13287, 15759, 22661, 28737, 39861, 54281, 67983, 75293, 137299, 162843, 203949, 225879, 411897, 488529, 677637, 1235691, 2334083, 7002249, 21006747]

約数ペア:

[(1, 21006747), (3, 7002249), (9, 2334083), (17, 1235691), (31, 677637), (43, 488529), (51, 411897), (93, 225879), (103, 203949), (129, 162843), (153, 137299), (279, 75293), (309, 67983), (387, 54281), (527, 39861), (731, 28737), (927, 22661), (1333, 15759), (1581, 13287), (1751, 11997), (2193, 9579), (3193, 6579), (3999, 5253), (4429, 4743)]