20420485

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 27447552

約数和(自身を除く): 7027067

約数列:

[1, 5, 17, 37, 43, 85, 151, 185, 215, 629, 731, 755, 1591, 2567, 3145, 3655, 5587, 6493, 7955, 12835, 27047, 27935, 32465, 94979, 110381, 135235, 240241, 474895, 551905, 1201205, 4084097, 20420485]

約数ペア:

[(1, 20420485), (5, 4084097), (17, 1201205), (37, 551905), (43, 474895), (85, 240241), (151, 135235), (185, 110381), (215, 94979), (629, 32465), (731, 27935), (755, 27047), (1591, 12835), (2567, 7955), (3145, 6493), (3655, 5587)]