20919745

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{811}}^1$

素因数の和:901

約数の個数: 32

約数和(自身を含む): 31804416

約数和(自身を除く): 10884671

約数列:

[1, 5, 7, 11, 35, 55, 67, 77, 335, 385, 469, 737, 811, 2345, 3685, 4055, 5159, 5677, 8921, 25795, 28385, 44605, 54337, 62447, 271685, 312235, 380359, 597707, 1901795, 2988535, 4183949, 20919745]

約数ペア:

[(1, 20919745), (5, 4183949), (7, 2988535), (11, 1901795), (35, 597707), (55, 380359), (67, 312235), (77, 271685), (335, 62447), (385, 54337), (469, 44605), (737, 28385), (811, 25795), (2345, 8921), (3685, 5677), (4055, 5159)]