20804680

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40009}}^1$

素因数の和:40033

約数の個数: 32

約数和(自身を含む): 50412600

約数和(自身を除く): 29607920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40009, 80018, 160036, 200045, 320072, 400090, 520117, 800180, 1040234, 1600360, 2080468, 2600585, 4160936, 5201170, 10402340, 20804680]

約数ペア:

[(1, 20804680), (2, 10402340), (4, 5201170), (5, 4160936), (8, 2600585), (10, 2080468), (13, 1600360), (20, 1040234), (26, 800180), (40, 520117), (52, 400090), (65, 320072), (104, 200045), (130, 160036), (260, 80018), (520, 40009)]