2155000

素因数分解:

$2^3\times 5^4\times {\mathrm{431}}^1$

素因数の和:457

約数の個数: 40

約数和(自身を含む): 5060880

約数和(自身を除く): 2905880

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 431, 500, 625, 862, 1000, 1250, 1724, 2155, 2500, 3448, 4310, 5000, 8620, 10775, 17240, 21550, 43100, 53875, 86200, 107750, 215500, 269375, 431000, 538750, 1077500, 2155000]

約数ペア:

[(1, 2155000), (2, 1077500), (4, 538750), (5, 431000), (8, 269375), (10, 215500), (20, 107750), (25, 86200), (40, 53875), (50, 43100), (100, 21550), (125, 17240), (200, 10775), (250, 8620), (431, 5000), (500, 4310), (625, 3448), (862, 2500), (1000, 2155), (1250, 1724)]