20579500

素因数分解:

$2^2\times 5^3\times {\mathrm{79}}^1\times {\mathrm{521}}^1$

素因数の和:619

約数の個数: 48

約数和(自身を含む): 45601920

約数和(自身を除く): 25022420

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 125, 158, 250, 316, 395, 500, 521, 790, 1042, 1580, 1975, 2084, 2605, 3950, 5210, 7900, 9875, 10420, 13025, 19750, 26050, 39500, 41159, 52100, 65125, 82318, 130250, 164636, 205795, 260500, 411590, 823180, 1028975, 2057950, 4115900, 5144875, 10289750, 20579500]

約数ペア:

[(1, 20579500), (2, 10289750), (4, 5144875), (5, 4115900), (10, 2057950), (20, 1028975), (25, 823180), (50, 411590), (79, 260500), (100, 205795), (125, 164636), (158, 130250), (250, 82318), (316, 65125), (395, 52100), (500, 41159), (521, 39500), (790, 26050), (1042, 19750), (1580, 13025), (1975, 10420), (2084, 9875), (2605, 7900), (3950, 5210)]