18992155

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 29302560

約数和(自身を除く): 10310405

約数列:

[1, 5, 7, 13, 35, 49, 65, 67, 89, 91, 245, 335, 445, 455, 469, 623, 637, 871, 1157, 2345, 3115, 3185, 3283, 4355, 4361, 5785, 5963, 6097, 8099, 16415, 21805, 29815, 30485, 40495, 41741, 42679, 56693, 77519, 208705, 213395, 283465, 292187, 387595, 542633, 1460935, 2713165, 3798431, 18992155]

約数ペア:

[(1, 18992155), (5, 3798431), (7, 2713165), (13, 1460935), (35, 542633), (49, 387595), (65, 292187), (67, 283465), (89, 213395), (91, 208705), (245, 77519), (335, 56693), (445, 42679), (455, 41741), (469, 40495), (623, 30485), (637, 29815), (871, 21805), (1157, 16415), (2345, 8099), (3115, 6097), (3185, 5963), (3283, 5785), (4355, 4361)]