20961655

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1543}}^1$

素因数の和:1591

約数の個数: 32

約数和(自身を含む): 31127040

約数和(自身を除く): 10165385

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 143, 209, 247, 715, 1045, 1235, 1543, 2717, 7715, 13585, 16973, 20059, 29317, 84865, 100295, 146585, 220649, 322487, 381121, 1103245, 1612435, 1905605, 4192331, 20961655]

約数ペア:

[(1, 20961655), (5, 4192331), (11, 1905605), (13, 1612435), (19, 1103245), (55, 381121), (65, 322487), (95, 220649), (143, 146585), (209, 100295), (247, 84865), (715, 29317), (1045, 20059), (1235, 16973), (1543, 13585), (2717, 7715)]