644841

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{419}}^1$

素因数の和:450

約数の個数: 20

約数和(自身を含む): 1016400

約数和(自身を除く): 371559

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 419, 513, 1257, 1539, 3771, 7961, 11313, 23883, 33939, 71649, 214947, 644841]

約数ペア:

[(1, 644841), (3, 214947), (9, 71649), (19, 33939), (27, 23883), (57, 11313), (81, 7961), (171, 3771), (419, 1539), (513, 1257)]