201991320005

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{431}}^1\times {\mathrm{42937}}^1$

素因数の和:43469

約数の個数: 32

約数和(自身を含む): 253753274880

約数和(自身を除く): 51761954875

約数列:

[1, 5, 37, 59, 185, 295, 431, 2155, 2183, 10915, 15947, 25429, 42937, 79735, 127145, 214685, 940873, 1588669, 2533283, 4704365, 7943345, 12666415, 18505847, 92529235, 93731471, 468657355, 684716339, 1091844973, 3423581695, 5459224865, 40398264001, 201991320005]

約数ペア:

[(1, 201991320005), (5, 40398264001), (37, 5459224865), (59, 3423581695), (185, 1091844973), (295, 684716339), (431, 468657355), (2155, 93731471), (2183, 92529235), (10915, 18505847), (15947, 12666415), (25429, 7943345), (42937, 4704365), (79735, 2533283), (127145, 1588669), (214685, 940873)]