21578000

素因数分解:

$2^4\times 5^3\times {\mathrm{10789}}^1$

素因数の和:10812

約数の個数: 40

約数和(自身を含む): 52180440

約数和(自身を除く): 30602440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10789, 21578, 43156, 53945, 86312, 107890, 172624, 215780, 269725, 431560, 539450, 863120, 1078900, 1348625, 2157800, 2697250, 4315600, 5394500, 10789000, 21578000]

約数ペア:

[(1, 21578000), (2, 10789000), (4, 5394500), (5, 4315600), (8, 2697250), (10, 2157800), (16, 1348625), (20, 1078900), (25, 863120), (40, 539450), (50, 431560), (80, 269725), (100, 215780), (125, 172624), (200, 107890), (250, 86312), (400, 53945), (500, 43156), (1000, 21578), (2000, 10789)]