20776905

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^2\times {\mathrm{61}}^1$

素因数の和:136

約数の個数: 60

約数和(自身を含む): 39205452

約数和(自身を除く): 18428547

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 61, 81, 87, 135, 145, 183, 261, 305, 405, 435, 549, 783, 841, 915, 1305, 1647, 1769, 2349, 2523, 2745, 3915, 4205, 4941, 5307, 7569, 8235, 8845, 11745, 12615, 15921, 22707, 24705, 26535, 37845, 47763, 51301, 68121, 79605, 113535, 143289, 153903, 238815, 256505, 340605, 461709, 716445, 769515, 1385127, 2308545, 4155381, 6925635, 20776905]

約数ペア:

[(1, 20776905), (3, 6925635), (5, 4155381), (9, 2308545), (15, 1385127), (27, 769515), (29, 716445), (45, 461709), (61, 340605), (81, 256505), (87, 238815), (135, 153903), (145, 143289), (183, 113535), (261, 79605), (305, 68121), (405, 51301), (435, 47763), (549, 37845), (783, 26535), (841, 24705), (915, 22707), (1305, 15921), (1647, 12615), (1769, 11745), (2349, 8845), (2523, 8235), (2745, 7569), (3915, 5307), (4205, 4941)]