21528171

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20101}}^1$

素因数の和:20131

約数の個数: 24

約数和(自身を含む): 37630944

約数和(自身を除く): 16102773

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20101, 60303, 140707, 180909, 341717, 422121, 1025151, 1266363, 2392019, 3075453, 7176057, 21528171]

約数ペア:

[(1, 21528171), (3, 7176057), (7, 3075453), (9, 2392019), (17, 1266363), (21, 1025151), (51, 422121), (63, 341717), (119, 180909), (153, 140707), (357, 60303), (1071, 20101)]