20863557

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:115

約数の個数: 72

約数和(自身を含む): 37683360

約数和(自身を除く): 16819803

約数列:

[1, 3, 9, 11, 13, 29, 33, 39, 43, 87, 99, 117, 129, 143, 169, 261, 319, 377, 387, 429, 473, 507, 559, 957, 1131, 1247, 1287, 1419, 1521, 1677, 1859, 2871, 3393, 3741, 4147, 4257, 4901, 5031, 5577, 6149, 7267, 11223, 12441, 13717, 14703, 16211, 16731, 18447, 21801, 37323, 41151, 44109, 48633, 53911, 55341, 65403, 79937, 123453, 145899, 161733, 178321, 210743, 239811, 485199, 534963, 632229, 719433, 1604889, 1896687, 2318173, 6954519, 20863557]

約数ペア:

[(1, 20863557), (3, 6954519), (9, 2318173), (11, 1896687), (13, 1604889), (29, 719433), (33, 632229), (39, 534963), (43, 485199), (87, 239811), (99, 210743), (117, 178321), (129, 161733), (143, 145899), (169, 123453), (261, 79937), (319, 65403), (377, 55341), (387, 53911), (429, 48633), (473, 44109), (507, 41151), (559, 37323), (957, 21801), (1131, 18447), (1247, 16731), (1287, 16211), (1419, 14703), (1521, 13717), (1677, 12441), (1859, 11223), (2871, 7267), (3393, 6149), (3741, 5577), (4147, 5031), (4257, 4901)]