28420275

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{283}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 51274496

約数和(自身を除く): 22854221

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 103, 195, 283, 309, 325, 515, 849, 975, 1339, 1415, 1545, 2575, 3679, 4017, 4245, 6695, 7075, 7725, 11037, 18395, 20085, 21225, 29149, 33475, 55185, 87447, 91975, 100425, 145745, 275925, 378937, 437235, 728725, 1136811, 1894685, 2186175, 5684055, 9473425, 28420275]

約数ペア:

[(1, 28420275), (3, 9473425), (5, 5684055), (13, 2186175), (15, 1894685), (25, 1136811), (39, 728725), (65, 437235), (75, 378937), (103, 275925), (195, 145745), (283, 100425), (309, 91975), (325, 87447), (515, 55185), (849, 33475), (975, 29149), (1339, 21225), (1415, 20085), (1545, 18395), (2575, 11037), (3679, 7725), (4017, 7075), (4245, 6695)]