20199500

素因数分解:

$2^2\times 5^3\times {\mathrm{71}}^1\times {\mathrm{569}}^1$

素因数の和:659

約数の個数: 48

約数和(自身を含む): 44815680

約数和(自身を除く): 24616180

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 125, 142, 250, 284, 355, 500, 569, 710, 1138, 1420, 1775, 2276, 2845, 3550, 5690, 7100, 8875, 11380, 14225, 17750, 28450, 35500, 40399, 56900, 71125, 80798, 142250, 161596, 201995, 284500, 403990, 807980, 1009975, 2019950, 4039900, 5049875, 10099750, 20199500]

約数ペア:

[(1, 20199500), (2, 10099750), (4, 5049875), (5, 4039900), (10, 2019950), (20, 1009975), (25, 807980), (50, 403990), (71, 284500), (100, 201995), (125, 161596), (142, 142250), (250, 80798), (284, 71125), (355, 56900), (500, 40399), (569, 35500), (710, 28450), (1138, 17750), (1420, 14225), (1775, 11380), (2276, 8875), (2845, 7100), (3550, 5690)]