20691475

素因数分解:

$5^2\times 7^3\times {\mathrm{19}}^1\times {\mathrm{127}}^1$

素因数の和:177

約数の個数: 48

約数和(自身を含む): 31744000

約数和(自身を除く): 11052525

約数列:

[1, 5, 7, 19, 25, 35, 49, 95, 127, 133, 175, 245, 343, 475, 635, 665, 889, 931, 1225, 1715, 2413, 3175, 3325, 4445, 4655, 6223, 6517, 8575, 12065, 16891, 22225, 23275, 31115, 32585, 43561, 60325, 84455, 118237, 155575, 162925, 217805, 422275, 591185, 827659, 1089025, 2955925, 4138295, 20691475]

約数ペア:

[(1, 20691475), (5, 4138295), (7, 2955925), (19, 1089025), (25, 827659), (35, 591185), (49, 422275), (95, 217805), (127, 162925), (133, 155575), (175, 118237), (245, 84455), (343, 60325), (475, 43561), (635, 32585), (665, 31115), (889, 23275), (931, 22225), (1225, 16891), (1715, 12065), (2413, 8575), (3175, 6517), (3325, 6223), (4445, 4655)]