28971225

素因数分解:

$3^2\times 5^2\times {\mathrm{128761}}^1$

素因数の和:128777

約数の個数: 18

約数和(自身を含む): 51891086

約数和(自身を除く): 22919861

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 128761, 386283, 643805, 1158849, 1931415, 3219025, 5794245, 9657075, 28971225]

約数ペア:

[(1, 28971225), (3, 9657075), (5, 5794245), (9, 3219025), (15, 1931415), (25, 1158849), (45, 643805), (75, 386283), (225, 128761)]