20690000

素因数分解:

$2^4\times 5^4\times {\mathrm{2069}}^1$

素因数の和:2097

約数の個数: 50

約数和(自身を含む): 50116770

約数和(自身を除く): 29426770

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2069, 2500, 4138, 5000, 8276, 10000, 10345, 16552, 20690, 33104, 41380, 51725, 82760, 103450, 165520, 206900, 258625, 413800, 517250, 827600, 1034500, 1293125, 2069000, 2586250, 4138000, 5172500, 10345000, 20690000]

約数ペア:

[(1, 20690000), (2, 10345000), (4, 5172500), (5, 4138000), (8, 2586250), (10, 2069000), (16, 1293125), (20, 1034500), (25, 827600), (40, 517250), (50, 413800), (80, 258625), (100, 206900), (125, 165520), (200, 103450), (250, 82760), (400, 51725), (500, 41380), (625, 33104), (1000, 20690), (1250, 16552), (2000, 10345), (2069, 10000), (2500, 8276), (4138, 5000)]