19777868

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{193}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 40479264

約数和(自身を除く): 20701396

約数列:

[1, 2, 4, 11, 17, 22, 34, 44, 68, 137, 187, 193, 274, 374, 386, 548, 748, 772, 1507, 2123, 2329, 3014, 3281, 4246, 4658, 6028, 6562, 8492, 9316, 13124, 25619, 26441, 36091, 51238, 52882, 72182, 102476, 105764, 144364, 290851, 449497, 581702, 898994, 1163404, 1797988, 4944467, 9888934, 19777868]

約数ペア:

[(1, 19777868), (2, 9888934), (4, 4944467), (11, 1797988), (17, 1163404), (22, 898994), (34, 581702), (44, 449497), (68, 290851), (137, 144364), (187, 105764), (193, 102476), (274, 72182), (374, 52882), (386, 51238), (548, 36091), (748, 26441), (772, 25619), (1507, 13124), (2123, 9316), (2329, 8492), (3014, 6562), (3281, 6028), (4246, 4658)]