20378500

素因数分解:

$2^2\times 5^3\times {\mathrm{53}}^1\times {\mathrm{769}}^1$

素因数の和:841

約数の個数: 48

約数和(自身を含む): 45405360

約数和(自身を除く): 25026860

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 53, 100, 106, 125, 212, 250, 265, 500, 530, 769, 1060, 1325, 1538, 2650, 3076, 3845, 5300, 6625, 7690, 13250, 15380, 19225, 26500, 38450, 40757, 76900, 81514, 96125, 163028, 192250, 203785, 384500, 407570, 815140, 1018925, 2037850, 4075700, 5094625, 10189250, 20378500]

約数ペア:

[(1, 20378500), (2, 10189250), (4, 5094625), (5, 4075700), (10, 2037850), (20, 1018925), (25, 815140), (50, 407570), (53, 384500), (100, 203785), (106, 192250), (125, 163028), (212, 96125), (250, 81514), (265, 76900), (500, 40757), (530, 38450), (769, 26500), (1060, 19225), (1325, 15380), (1538, 13250), (2650, 7690), (3076, 6625), (3845, 5300)]