19997685

素因数分解:

$3^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{151}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 36516480

約数和(自身を除く): 16518795

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 109, 135, 151, 243, 327, 405, 453, 545, 755, 981, 1215, 1359, 1635, 2265, 2943, 4077, 4905, 6795, 8829, 12231, 14715, 16459, 20385, 26487, 36693, 44145, 49377, 61155, 82295, 132435, 148131, 183465, 246885, 444393, 740655, 1333179, 2221965, 3999537, 6665895, 19997685]

約数ペア:

[(1, 19997685), (3, 6665895), (5, 3999537), (9, 2221965), (15, 1333179), (27, 740655), (45, 444393), (81, 246885), (109, 183465), (135, 148131), (151, 132435), (243, 82295), (327, 61155), (405, 49377), (453, 44145), (545, 36693), (755, 26487), (981, 20385), (1215, 16459), (1359, 14715), (1635, 12231), (2265, 8829), (2943, 6795), (4077, 4905)]