20217321

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{1091}}^1$

素因数の和:1197

約数の個数: 24

約数和(自身を含む): 30663360

約数和(自身を除く): 10446039

約数列:

[1, 3, 9, 29, 71, 87, 213, 261, 639, 1091, 2059, 3273, 6177, 9819, 18531, 31639, 77461, 94917, 232383, 284751, 697149, 2246369, 6739107, 20217321]

約数ペア:

[(1, 20217321), (3, 6739107), (9, 2246369), (29, 697149), (71, 284751), (87, 232383), (213, 94917), (261, 77461), (639, 31639), (1091, 18531), (2059, 9819), (3273, 6177)]