20631580

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{4889}}^1$

素因数の和:5109

約数の個数: 24

約数和(自身を含む): 43540560

約数和(自身を除く): 22908980

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 4889, 9778, 19556, 24445, 48890, 97780, 1031579, 2063158, 4126316, 5157895, 10315790, 20631580]

約数ペア:

[(1, 20631580), (2, 10315790), (4, 5157895), (5, 4126316), (10, 2063158), (20, 1031579), (211, 97780), (422, 48890), (844, 24445), (1055, 19556), (2110, 9778), (4220, 4889)]