25721991

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{359}}^1\times {\mathrm{419}}^1$

素因数の和:803

約数の個数: 24

約数和(自身を含む): 39312000

約数和(自身を除く): 13590009

約数列:

[1, 3, 9, 19, 57, 171, 359, 419, 1077, 1257, 3231, 3771, 6821, 7961, 20463, 23883, 61389, 71649, 150421, 451263, 1353789, 2857999, 8573997, 25721991]

約数ペア:

[(1, 25721991), (3, 8573997), (9, 2857999), (19, 1353789), (57, 451263), (171, 150421), (359, 71649), (419, 61389), (1077, 23883), (1257, 20463), (3231, 7961), (3771, 6821)]