20803900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1231}}^1$

素因数の和:1271

約数の個数: 54

約数和(自身を含む): 48923952

約数和(自身を除く): 28120052

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 169, 260, 325, 338, 650, 676, 845, 1231, 1300, 1690, 2462, 3380, 4225, 4924, 6155, 8450, 12310, 16003, 16900, 24620, 30775, 32006, 61550, 64012, 80015, 123100, 160030, 208039, 320060, 400075, 416078, 800150, 832156, 1040195, 1600300, 2080390, 4160780, 5200975, 10401950, 20803900]

約数ペア:

[(1, 20803900), (2, 10401950), (4, 5200975), (5, 4160780), (10, 2080390), (13, 1600300), (20, 1040195), (25, 832156), (26, 800150), (50, 416078), (52, 400075), (65, 320060), (100, 208039), (130, 160030), (169, 123100), (260, 80015), (325, 64012), (338, 61550), (650, 32006), (676, 30775), (845, 24620), (1231, 16900), (1300, 16003), (1690, 12310), (2462, 8450), (3380, 6155), (4225, 4924)]