21279255

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1667}}^1$

素因数の和:1735

約数の個数: 32

約数和(自身を含む): 36509184

約数和(自身を除く): 15229929

約数列:

[1, 3, 5, 15, 23, 37, 69, 111, 115, 185, 345, 555, 851, 1667, 2553, 4255, 5001, 8335, 12765, 25005, 38341, 61679, 115023, 185037, 191705, 308395, 575115, 925185, 1418617, 4255851, 7093085, 21279255]

約数ペア:

[(1, 21279255), (3, 7093085), (5, 4255851), (15, 1418617), (23, 925185), (37, 575115), (69, 308395), (111, 191705), (115, 185037), (185, 115023), (345, 61679), (555, 38341), (851, 25005), (1667, 12765), (2553, 8335), (4255, 5001)]