21405761

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{1097}}^1$

素因数の和:1208

約数の個数: 16

約数和(自身を含む): 24595200

約数和(自身を除く): 3189439

約数列:

[1, 13, 19, 79, 247, 1027, 1097, 1501, 14261, 19513, 20843, 86663, 270959, 1126619, 1646597, 21405761]

約数ペア:

[(1, 21405761), (13, 1646597), (19, 1126619), (79, 270959), (247, 86663), (1027, 20843), (1097, 19513), (1501, 14261)]