20821275

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3191}}^1$

素因数の和:3236

約数の個数: 36

約数和(自身を含む): 38591280

約数和(自身を除く): 17770005

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3191, 6525, 9573, 15955, 28719, 47865, 79775, 92539, 143595, 239325, 277617, 462695, 717975, 832851, 1388085, 2313475, 4164255, 6940425, 20821275]

約数ペア:

[(1, 20821275), (3, 6940425), (5, 4164255), (9, 2313475), (15, 1388085), (25, 832851), (29, 717975), (45, 462695), (75, 277617), (87, 239325), (145, 143595), (225, 92539), (261, 79775), (435, 47865), (725, 28719), (1305, 15955), (2175, 9573), (3191, 6525)]