20778784

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{251}}^1$

素因数の和:473

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 23674016

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 199, 208, 251, 398, 416, 502, 796, 1004, 1592, 2008, 2587, 3184, 3263, 4016, 5174, 6368, 6526, 8032, 10348, 13052, 20696, 26104, 41392, 49949, 52208, 82784, 99898, 104416, 199796, 399592, 649337, 799184, 1298674, 1598368, 2597348, 5194696, 10389392, 20778784]

約数ペア:

[(1, 20778784), (2, 10389392), (4, 5194696), (8, 2597348), (13, 1598368), (16, 1298674), (26, 799184), (32, 649337), (52, 399592), (104, 199796), (199, 104416), (208, 99898), (251, 82784), (398, 52208), (416, 49949), (502, 41392), (796, 26104), (1004, 20696), (1592, 13052), (2008, 10348), (2587, 8032), (3184, 6526), (3263, 6368), (4016, 5174)]