18909275

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1$

素因数の和:105

約数の個数: 72

約数和(自身を含む): 31664640

約数和(自身を除く): 12755365

約数列:

[1, 5, 7, 11, 19, 25, 35, 47, 55, 77, 95, 121, 133, 175, 209, 235, 275, 329, 385, 475, 517, 605, 665, 847, 893, 1045, 1175, 1463, 1645, 1925, 2299, 2585, 3025, 3325, 3619, 4235, 4465, 5225, 5687, 6251, 7315, 8225, 9823, 11495, 12925, 16093, 18095, 21175, 22325, 28435, 31255, 36575, 39809, 49115, 57475, 68761, 80465, 90475, 108053, 142175, 156275, 199045, 245575, 343805, 402325, 540265, 756371, 995225, 1719025, 2701325, 3781855, 18909275]

約数ペア:

[(1, 18909275), (5, 3781855), (7, 2701325), (11, 1719025), (19, 995225), (25, 756371), (35, 540265), (47, 402325), (55, 343805), (77, 245575), (95, 199045), (121, 156275), (133, 142175), (175, 108053), (209, 90475), (235, 80465), (275, 68761), (329, 57475), (385, 49115), (475, 39809), (517, 36575), (605, 31255), (665, 28435), (847, 22325), (893, 21175), (1045, 18095), (1175, 16093), (1463, 12925), (1645, 11495), (1925, 9823), (2299, 8225), (2585, 7315), (3025, 6251), (3325, 5687), (3619, 5225), (4235, 4465)]