655371

素因数分解:

$3^6\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:78

約数の個数: 28

約数和(自身を含む): 1049280

約数和(自身を除く): 393909

約数列:

[1, 3, 9, 27, 29, 31, 81, 87, 93, 243, 261, 279, 729, 783, 837, 899, 2349, 2511, 2697, 7047, 7533, 8091, 21141, 22599, 24273, 72819, 218457, 655371]

約数ペア:

[(1, 655371), (3, 218457), (9, 72819), (27, 24273), (29, 22599), (31, 21141), (81, 8091), (87, 7533), (93, 7047), (243, 2697), (261, 2511), (279, 2349), (729, 899), (783, 837)]