21480560

素因数分解:

$2^4\times 5^1\times {\mathrm{268507}}^1$

素因数の和:268520

約数の個数: 20

約数和(自身を含む): 49942488

約数和(自身を除く): 28461928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268507, 537014, 1074028, 1342535, 2148056, 2685070, 4296112, 5370140, 10740280, 21480560]

約数ペア:

[(1, 21480560), (2, 10740280), (4, 5370140), (5, 4296112), (8, 2685070), (10, 2148056), (16, 1342535), (20, 1074028), (40, 537014), (80, 268507)]