18870215

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{619}}^1$

素因数の和:711

約数の個数: 32

約数和(自身を含む): 28331520

約数和(自身を除く): 9461305

約数列:

[1, 5, 7, 13, 35, 65, 67, 91, 335, 455, 469, 619, 871, 2345, 3095, 4333, 4355, 6097, 8047, 21665, 30485, 40235, 41473, 56329, 207365, 281645, 290311, 539149, 1451555, 2695745, 3774043, 18870215]

約数ペア:

[(1, 18870215), (5, 3774043), (7, 2695745), (13, 1451555), (35, 539149), (65, 290311), (67, 281645), (91, 207365), (335, 56329), (455, 41473), (469, 40235), (619, 30485), (871, 21665), (2345, 8047), (3095, 6097), (4333, 4355)]