21955000

素因数分解:

$2^3\times 5^4\times {\mathrm{4391}}^1$

素因数の和:4417

約数の個数: 40

約数和(自身を含む): 51452280

約数和(自身を除く): 29497280

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 4391, 5000, 8782, 17564, 21955, 35128, 43910, 87820, 109775, 175640, 219550, 439100, 548875, 878200, 1097750, 2195500, 2744375, 4391000, 5488750, 10977500, 21955000]

約数ペア:

[(1, 21955000), (2, 10977500), (4, 5488750), (5, 4391000), (8, 2744375), (10, 2195500), (20, 1097750), (25, 878200), (40, 548875), (50, 439100), (100, 219550), (125, 175640), (200, 109775), (250, 87820), (500, 43910), (625, 35128), (1000, 21955), (1250, 17564), (2500, 8782), (4391, 5000)]