20597785

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 7343975

約数列:

[1, 5, 13, 41, 59, 65, 131, 205, 295, 533, 655, 767, 1703, 2419, 2665, 3835, 5371, 7729, 8515, 12095, 26855, 31447, 38645, 69823, 100477, 157235, 316889, 349115, 502385, 1584445, 4119557, 20597785]

約数ペア:

[(1, 20597785), (5, 4119557), (13, 1584445), (41, 502385), (59, 349115), (65, 316889), (131, 157235), (205, 100477), (295, 69823), (533, 38645), (655, 31447), (767, 26855), (1703, 12095), (2419, 8515), (2665, 7729), (3835, 5371)]