21487081

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{773}}^1$

素因数の和:829

約数の個数: 24

約数和(自身を含む): 28309824

約数和(自身を除く): 6822743

約数列:

[1, 7, 11, 19, 77, 133, 209, 361, 773, 1463, 2527, 3971, 5411, 8503, 14687, 27797, 59521, 102809, 161557, 279053, 1130899, 1953371, 3069583, 21487081]

約数ペア:

[(1, 21487081), (7, 3069583), (11, 1953371), (19, 1130899), (77, 279053), (133, 161557), (209, 102809), (361, 59521), (773, 27797), (1463, 14687), (2527, 8503), (3971, 5411)]