20529855

素因数分解:

$3^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{277}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 37643424

約数和(自身を除く): 17113569

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 81, 135, 183, 243, 277, 305, 405, 549, 831, 915, 1215, 1385, 1647, 2493, 2745, 4155, 4941, 7479, 8235, 12465, 14823, 16897, 22437, 24705, 37395, 50691, 67311, 74115, 84485, 112185, 152073, 253455, 336555, 456219, 760365, 1368657, 2281095, 4105971, 6843285, 20529855]

約数ペア:

[(1, 20529855), (3, 6843285), (5, 4105971), (9, 2281095), (15, 1368657), (27, 760365), (45, 456219), (61, 336555), (81, 253455), (135, 152073), (183, 112185), (243, 84485), (277, 74115), (305, 67311), (405, 50691), (549, 37395), (831, 24705), (915, 22437), (1215, 16897), (1385, 14823), (1647, 12465), (2493, 8235), (2745, 7479), (4155, 4941)]