20783007

素因数分解:

$3^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{683}}^1$

素因数の和:729

約数の個数: 48

約数和(自身を含む): 37428480

約数和(自身を除く): 16645473

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 147, 161, 189, 207, 441, 483, 621, 683, 1127, 1323, 1449, 2049, 3381, 4347, 4781, 6147, 10143, 14343, 15709, 18441, 30429, 33467, 43029, 47127, 100401, 109963, 129087, 141381, 301203, 329889, 424143, 769741, 903609, 989667, 2309223, 2969001, 6927669, 20783007]

約数ペア:

[(1, 20783007), (3, 6927669), (7, 2969001), (9, 2309223), (21, 989667), (23, 903609), (27, 769741), (49, 424143), (63, 329889), (69, 301203), (147, 141381), (161, 129087), (189, 109963), (207, 100401), (441, 47127), (483, 43029), (621, 33467), (683, 30429), (1127, 18441), (1323, 15709), (1449, 14343), (2049, 10143), (3381, 6147), (4347, 4781)]