19919529

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2657}}^1$

素因数の和:2694

約数の個数: 36

約数和(自身を含む): 35452404

約数和(自身を除く): 15532875

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 357, 441, 833, 1071, 2499, 2657, 7497, 7971, 18599, 23913, 45169, 55797, 130193, 135507, 167391, 316183, 390579, 406521, 948549, 1171737, 2213281, 2845647, 6639843, 19919529]

約数ペア:

[(1, 19919529), (3, 6639843), (7, 2845647), (9, 2213281), (17, 1171737), (21, 948549), (49, 406521), (51, 390579), (63, 316183), (119, 167391), (147, 135507), (153, 130193), (357, 55797), (441, 45169), (833, 23913), (1071, 18599), (2499, 7971), (2657, 7497)]