19983755

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:140

約数の個数: 48

約数和(自身を含む): 29302560

約数和(自身を除く): 9318805

約数列:

[1, 5, 11, 17, 29, 55, 67, 85, 121, 145, 187, 319, 335, 493, 605, 737, 935, 1139, 1595, 1943, 2057, 2465, 3509, 3685, 5423, 5695, 8107, 9715, 10285, 12529, 17545, 21373, 27115, 33031, 40535, 59653, 62645, 106865, 137819, 165155, 235103, 298265, 363341, 689095, 1175515, 1816705, 3996751, 19983755]

約数ペア:

[(1, 19983755), (5, 3996751), (11, 1816705), (17, 1175515), (29, 689095), (55, 363341), (67, 298265), (85, 235103), (121, 165155), (145, 137819), (187, 106865), (319, 62645), (335, 59653), (493, 40535), (605, 33031), (737, 27115), (935, 21373), (1139, 17545), (1595, 12529), (1943, 10285), (2057, 9715), (2465, 8107), (3509, 5695), (3685, 5423)]