19487960

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2309}}^1$

素因数の和:2531

約数の個数: 32

約数和(自身を含む): 44074800

約数和(自身を除く): 24586840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 2309, 4220, 4618, 8440, 9236, 11545, 18472, 23090, 46180, 92360, 487199, 974398, 1948796, 2435995, 3897592, 4871990, 9743980, 19487960]

約数ペア:

[(1, 19487960), (2, 9743980), (4, 4871990), (5, 3897592), (8, 2435995), (10, 1948796), (20, 974398), (40, 487199), (211, 92360), (422, 46180), (844, 23090), (1055, 18472), (1688, 11545), (2110, 9236), (2309, 8440), (4220, 4618)]