19712740

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{313}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 43045632

約数和(自身を除く): 23332892

約数列:

[1, 2, 4, 5, 10, 20, 47, 67, 94, 134, 188, 235, 268, 313, 335, 470, 626, 670, 940, 1252, 1340, 1565, 3130, 3149, 6260, 6298, 12596, 14711, 15745, 20971, 29422, 31490, 41942, 58844, 62980, 73555, 83884, 104855, 147110, 209710, 294220, 419420, 985637, 1971274, 3942548, 4928185, 9856370, 19712740]

約数ペア:

[(1, 19712740), (2, 9856370), (4, 4928185), (5, 3942548), (10, 1971274), (20, 985637), (47, 419420), (67, 294220), (94, 209710), (134, 147110), (188, 104855), (235, 83884), (268, 73555), (313, 62980), (335, 58844), (470, 41942), (626, 31490), (670, 29422), (940, 20971), (1252, 15745), (1340, 14711), (1565, 12596), (3130, 6298), (3149, 6260)]