21128048

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19709}}^1$

素因数の和:19784

約数の個数: 20

約数和(自身を含む): 41548680

約数和(自身を除く): 20420632

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19709, 39418, 78836, 157672, 315344, 1320503, 2641006, 5282012, 10564024, 21128048]

約数ペア:

[(1, 21128048), (2, 10564024), (4, 5282012), (8, 2641006), (16, 1320503), (67, 315344), (134, 157672), (268, 78836), (536, 39418), (1072, 19709)]