21281679

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{1217}}^1$

素因数の和:1319

約数の個数: 24

約数和(自身を含む): 32301360

約数和(自身を除く): 11019681

約数列:

[1, 3, 9, 29, 67, 87, 201, 261, 603, 1217, 1943, 3651, 5829, 10953, 17487, 35293, 81539, 105879, 244617, 317637, 733851, 2364631, 7093893, 21281679]

約数ペア:

[(1, 21281679), (3, 7093893), (9, 2364631), (29, 733851), (67, 317637), (87, 244617), (201, 105879), (261, 81539), (603, 35293), (1217, 17487), (1943, 10953), (3651, 5829)]