20455435

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:164

約数の個数: 64

約数和(自身を含む): 33997824

約数和(自身を除く): 13542389

約数列:

[1, 5, 7, 11, 13, 35, 55, 61, 65, 67, 77, 91, 143, 305, 335, 385, 427, 455, 469, 671, 715, 737, 793, 871, 1001, 2135, 2345, 3355, 3685, 3965, 4087, 4355, 4697, 5005, 5159, 5551, 6097, 8723, 9581, 20435, 23485, 25795, 27755, 28609, 30485, 43615, 44957, 47905, 53131, 61061, 67067, 143045, 224785, 265655, 305305, 314699, 335335, 371917, 584441, 1573495, 1859585, 2922205, 4091087, 20455435]

約数ペア:

[(1, 20455435), (5, 4091087), (7, 2922205), (11, 1859585), (13, 1573495), (35, 584441), (55, 371917), (61, 335335), (65, 314699), (67, 305305), (77, 265655), (91, 224785), (143, 143045), (305, 67067), (335, 61061), (385, 53131), (427, 47905), (455, 44957), (469, 43615), (671, 30485), (715, 28609), (737, 27755), (793, 25795), (871, 23485), (1001, 20435), (2135, 9581), (2345, 8723), (3355, 6097), (3685, 5551), (3965, 5159), (4087, 5005), (4355, 4697)]