28128975

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{409}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 53687040

約数和(自身を除く): 25558065

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 131, 175, 393, 409, 525, 655, 917, 1227, 1965, 2045, 2751, 2863, 3275, 4585, 6135, 8589, 9825, 10225, 13755, 14315, 22925, 30675, 42945, 53579, 68775, 71575, 160737, 214725, 267895, 375053, 803685, 1125159, 1339475, 1875265, 4018425, 5625795, 9376325, 28128975]

約数ペア:

[(1, 28128975), (3, 9376325), (5, 5625795), (7, 4018425), (15, 1875265), (21, 1339475), (25, 1125159), (35, 803685), (75, 375053), (105, 267895), (131, 214725), (175, 160737), (393, 71575), (409, 68775), (525, 53579), (655, 42945), (917, 30675), (1227, 22925), (1965, 14315), (2045, 13755), (2751, 10225), (2863, 9825), (3275, 8589), (4585, 6135)]