20903500

素因数分解:

$2^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{431}}^1$

素因数の和:547

約数の個数: 48

約数和(自身を含む): 46230912

約数和(自身を除く): 25327412

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 97, 100, 125, 194, 250, 388, 431, 485, 500, 862, 970, 1724, 1940, 2155, 2425, 4310, 4850, 8620, 9700, 10775, 12125, 21550, 24250, 41807, 43100, 48500, 53875, 83614, 107750, 167228, 209035, 215500, 418070, 836140, 1045175, 2090350, 4180700, 5225875, 10451750, 20903500]

約数ペア:

[(1, 20903500), (2, 10451750), (4, 5225875), (5, 4180700), (10, 2090350), (20, 1045175), (25, 836140), (50, 418070), (97, 215500), (100, 209035), (125, 167228), (194, 107750), (250, 83614), (388, 53875), (431, 48500), (485, 43100), (500, 41807), (862, 24250), (970, 21550), (1724, 12125), (1940, 10775), (2155, 9700), (2425, 8620), (4310, 4850)]