20805255

素因数分解:

$3^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{1093}}^1$

素因数の和:1157

約数の個数: 40

約数和(自身を含む): 38123712

約数和(自身を除く): 17318457

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 81, 135, 141, 235, 405, 423, 705, 1093, 1269, 2115, 3279, 3807, 5465, 6345, 9837, 16395, 19035, 29511, 49185, 51371, 88533, 147555, 154113, 256855, 442665, 462339, 770565, 1387017, 2311695, 4161051, 6935085, 20805255]

約数ペア:

[(1, 20805255), (3, 6935085), (5, 4161051), (9, 2311695), (15, 1387017), (27, 770565), (45, 462339), (47, 442665), (81, 256855), (135, 154113), (141, 147555), (235, 88533), (405, 51371), (423, 49185), (705, 29511), (1093, 19035), (1269, 16395), (2115, 9837), (3279, 6345), (3807, 5465)]