28219725

素因数分解:

$3^3\times 5^2\times {\mathrm{97}}^1\times {\mathrm{431}}^1$

素因数の和:547

約数の個数: 48

約数和(自身を含む): 52496640

約数和(自身を除く): 24276915

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 97, 135, 225, 291, 431, 485, 675, 873, 1293, 1455, 2155, 2425, 2619, 3879, 4365, 6465, 7275, 10775, 11637, 13095, 19395, 21825, 32325, 41807, 58185, 65475, 96975, 125421, 209035, 290925, 376263, 627105, 1045175, 1128789, 1881315, 3135525, 5643945, 9406575, 28219725]

約数ペア:

[(1, 28219725), (3, 9406575), (5, 5643945), (9, 3135525), (15, 1881315), (25, 1128789), (27, 1045175), (45, 627105), (75, 376263), (97, 290925), (135, 209035), (225, 125421), (291, 96975), (431, 65475), (485, 58185), (675, 41807), (873, 32325), (1293, 21825), (1455, 19395), (2155, 13095), (2425, 11637), (2619, 10775), (3879, 7275), (4365, 6465)]