20715890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{8387}}^1$

素因数の和:8426

約数の個数: 32

約数和(自身を含む): 42275520

約数和(自身を除く): 21559630

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 494, 1235, 2470, 8387, 16774, 41935, 83870, 109031, 159353, 218062, 318706, 545155, 796765, 1090310, 1593530, 2071589, 4143178, 10357945, 20715890]

約数ペア:

[(1, 20715890), (2, 10357945), (5, 4143178), (10, 2071589), (13, 1593530), (19, 1090310), (26, 796765), (38, 545155), (65, 318706), (95, 218062), (130, 159353), (190, 109031), (247, 83870), (494, 41935), (1235, 16774), (2470, 8387)]