21785000

素因数分解:

$2^3\times 5^4\times {\mathrm{4357}}^1$

素因数の和:4383

約数の個数: 40

約数和(自身を含む): 51053970

約数和(自身を除く): 29268970

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 4357, 5000, 8714, 17428, 21785, 34856, 43570, 87140, 108925, 174280, 217850, 435700, 544625, 871400, 1089250, 2178500, 2723125, 4357000, 5446250, 10892500, 21785000]

約数ペア:

[(1, 21785000), (2, 10892500), (4, 5446250), (5, 4357000), (8, 2723125), (10, 2178500), (20, 1089250), (25, 871400), (40, 544625), (50, 435700), (100, 217850), (125, 174280), (200, 108925), (250, 87140), (500, 43570), (625, 34856), (1000, 21785), (1250, 17428), (2500, 8714), (4357, 5000)]