205728579

素因数分解:

$3^4\times 7^1\times {\mathrm{107}}^1\times {\mathrm{3391}}^1$

素因数の和:3517

約数の個数: 40

約数和(自身を含む): 354613248

約数和(自身を除く): 148884669

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 107, 189, 321, 567, 749, 963, 2247, 2889, 3391, 6741, 8667, 10173, 20223, 23737, 30519, 60669, 71211, 91557, 213633, 274671, 362837, 640899, 1088511, 1922697, 2539859, 3265533, 7619577, 9796599, 22858731, 29389797, 68576193, 205728579]

約数ペア:

[(1, 205728579), (3, 68576193), (7, 29389797), (9, 22858731), (21, 9796599), (27, 7619577), (63, 3265533), (81, 2539859), (107, 1922697), (189, 1088511), (321, 640899), (567, 362837), (749, 274671), (963, 213633), (2247, 91557), (2889, 71211), (3391, 60669), (6741, 30519), (8667, 23737), (10173, 20223)]