21591171

素因数分解:

$3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1609}}^1$

素因数の和:1696

約数の個数: 32

約数和(自身を含む): 37094400

約数和(自身を除く): 15503229

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 189, 213, 497, 639, 1491, 1609, 1917, 4473, 4827, 11263, 13419, 14481, 33789, 43443, 101367, 114239, 304101, 342717, 799673, 1028151, 2399019, 3084453, 7197057, 21591171]

約数ペア:

[(1, 21591171), (3, 7197057), (7, 3084453), (9, 2399019), (21, 1028151), (27, 799673), (63, 342717), (71, 304101), (189, 114239), (213, 101367), (497, 43443), (639, 33789), (1491, 14481), (1609, 13419), (1917, 11263), (4473, 4827)]