19387225

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1$

素因数の和:91

約数の個数: 72

約数和(自身を含む): 31169880

約数和(自身を除く): 11782655

約数列:

[1, 5, 11, 13, 17, 25, 29, 55, 65, 85, 121, 143, 145, 187, 221, 275, 319, 325, 377, 425, 493, 605, 715, 725, 935, 1105, 1573, 1595, 1885, 2057, 2431, 2465, 3025, 3509, 3575, 4147, 4675, 5423, 5525, 6409, 7865, 7975, 9425, 10285, 12155, 12325, 17545, 20735, 26741, 27115, 32045, 39325, 45617, 51425, 59653, 60775, 70499, 87725, 103675, 133705, 135575, 160225, 228085, 298265, 352495, 668525, 775489, 1140425, 1491325, 1762475, 3877445, 19387225]

約数ペア:

[(1, 19387225), (5, 3877445), (11, 1762475), (13, 1491325), (17, 1140425), (25, 775489), (29, 668525), (55, 352495), (65, 298265), (85, 228085), (121, 160225), (143, 135575), (145, 133705), (187, 103675), (221, 87725), (275, 70499), (319, 60775), (325, 59653), (377, 51425), (425, 45617), (493, 39325), (605, 32045), (715, 27115), (725, 26741), (935, 20735), (1105, 17545), (1573, 12325), (1595, 12155), (1885, 10285), (2057, 9425), (2431, 7975), (2465, 7865), (3025, 6409), (3509, 5525), (3575, 5423), (4147, 4675)]