20004145

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 28753920

約数和(自身を除く): 8749775

約数列:

[1, 5, 7, 31, 35, 103, 155, 179, 217, 515, 721, 895, 1085, 1253, 3193, 3605, 5549, 6265, 15965, 18437, 22351, 27745, 38843, 92185, 111755, 129059, 194215, 571547, 645295, 2857735, 4000829, 20004145]

約数ペア:

[(1, 20004145), (5, 4000829), (7, 2857735), (31, 645295), (35, 571547), (103, 194215), (155, 129059), (179, 111755), (217, 92185), (515, 38843), (721, 27745), (895, 22351), (1085, 18437), (1253, 15965), (3193, 6265), (3605, 5549)]