20520825

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{1619}}^1$

素因数の和:1658

約数の個数: 36

約数和(自身を含む): 36761040

約数和(自身を除く): 16240215

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 169, 195, 325, 507, 845, 975, 1619, 2535, 4225, 4857, 8095, 12675, 21047, 24285, 40475, 63141, 105235, 121425, 273611, 315705, 526175, 820833, 1368055, 1578525, 4104165, 6840275, 20520825]

約数ペア:

[(1, 20520825), (3, 6840275), (5, 4104165), (13, 1578525), (15, 1368055), (25, 820833), (39, 526175), (65, 315705), (75, 273611), (169, 121425), (195, 105235), (325, 63141), (507, 40475), (845, 24285), (975, 21047), (1619, 12675), (2535, 8095), (4225, 4857)]