28786900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:281

約数の個数: 72

約数和(自身を含む): 66836000

約数和(自身を除く): 38049100

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 109, 139, 190, 218, 278, 380, 436, 475, 545, 556, 695, 950, 1090, 1390, 1900, 2071, 2180, 2641, 2725, 2780, 3475, 4142, 5282, 5450, 6950, 8284, 10355, 10564, 10900, 13205, 13900, 15151, 20710, 26410, 30302, 41420, 51775, 52820, 60604, 66025, 75755, 103550, 132050, 151510, 207100, 264100, 287869, 303020, 378775, 575738, 757550, 1151476, 1439345, 1515100, 2878690, 5757380, 7196725, 14393450, 28786900]

約数ペア:

[(1, 28786900), (2, 14393450), (4, 7196725), (5, 5757380), (10, 2878690), (19, 1515100), (20, 1439345), (25, 1151476), (38, 757550), (50, 575738), (76, 378775), (95, 303020), (100, 287869), (109, 264100), (139, 207100), (190, 151510), (218, 132050), (278, 103550), (380, 75755), (436, 66025), (475, 60604), (545, 52820), (556, 51775), (695, 41420), (950, 30302), (1090, 26410), (1390, 20710), (1900, 15151), (2071, 13900), (2180, 13205), (2641, 10900), (2725, 10564), (2780, 10355), (3475, 8284), (4142, 6950), (5282, 5450)]