420880

素因数分解:

$2^4\times 5^1\times {\mathrm{5261}}^1$

素因数の和:5274

約数の個数: 20

約数和(自身を含む): 978732

約数和(自身を除く): 557852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5261, 10522, 21044, 26305, 42088, 52610, 84176, 105220, 210440, 420880]

約数ペア:

[(1, 420880), (2, 210440), (4, 105220), (5, 84176), (8, 52610), (10, 42088), (16, 26305), (20, 21044), (40, 10522), (80, 5261)]