20673639

素因数分解:

$3^2\times 7^3\times {\mathrm{37}}^1\times {\mathrm{181}}^1$

素因数の和:245

約数の個数: 48

約数和(自身を含む): 35963200

約数和(自身を除く): 15289561

約数列:

[1, 3, 7, 9, 21, 37, 49, 63, 111, 147, 181, 259, 333, 343, 441, 543, 777, 1029, 1267, 1629, 1813, 2331, 3087, 3801, 5439, 6697, 8869, 11403, 12691, 16317, 20091, 26607, 38073, 46879, 60273, 62083, 79821, 114219, 140637, 186249, 328153, 421911, 558747, 984459, 2297071, 2953377, 6891213, 20673639]

約数ペア:

[(1, 20673639), (3, 6891213), (7, 2953377), (9, 2297071), (21, 984459), (37, 558747), (49, 421911), (63, 328153), (111, 186249), (147, 140637), (181, 114219), (259, 79821), (333, 62083), (343, 60273), (441, 46879), (543, 38073), (777, 26607), (1029, 20091), (1267, 16317), (1629, 12691), (1813, 11403), (2331, 8869), (3087, 6697), (3801, 5439)]