20912255

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:144

約数の個数: 64

約数和(自身を含む): 33868800

約数和(自身を除く): 12956545

約数列:

[1, 5, 7, 13, 19, 35, 41, 59, 65, 91, 95, 133, 205, 247, 287, 295, 413, 455, 533, 665, 767, 779, 1121, 1235, 1435, 1729, 2065, 2419, 2665, 3731, 3835, 3895, 5369, 5453, 5605, 7847, 8645, 10127, 12095, 14573, 16933, 18655, 26845, 27265, 31447, 39235, 45961, 50635, 70889, 72865, 84665, 102011, 157235, 220129, 229805, 321727, 354445, 510055, 597493, 1100645, 1608635, 2987465, 4182451, 20912255]

約数ペア:

[(1, 20912255), (5, 4182451), (7, 2987465), (13, 1608635), (19, 1100645), (35, 597493), (41, 510055), (59, 354445), (65, 321727), (91, 229805), (95, 220129), (133, 157235), (205, 102011), (247, 84665), (287, 72865), (295, 70889), (413, 50635), (455, 45961), (533, 39235), (665, 31447), (767, 27265), (779, 26845), (1121, 18655), (1235, 16933), (1435, 14573), (1729, 12095), (2065, 10127), (2419, 8645), (2665, 7847), (3731, 5605), (3835, 5453), (3895, 5369)]