28204209

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{431}}^1\times {\mathrm{661}}^1$

素因数の和:1109

約数の個数: 24

約数和(自身を含む): 44613504

約数和(自身を除く): 16409295

約数列:

[1, 3, 9, 11, 33, 99, 431, 661, 1293, 1983, 3879, 4741, 5949, 7271, 14223, 21813, 42669, 65439, 284891, 854673, 2564019, 3133801, 9401403, 28204209]

約数ペア:

[(1, 28204209), (3, 9401403), (9, 3133801), (11, 2564019), (33, 854673), (99, 284891), (431, 65439), (661, 42669), (1293, 21813), (1983, 14223), (3879, 7271), (4741, 5949)]