21986780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64667}}^1$

素因数の和:64693

約数の個数: 24

約数和(自身を含む): 48889008

約数和(自身を除く): 26902228

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64667, 129334, 258668, 323335, 646670, 1099339, 1293340, 2198678, 4397356, 5496695, 10993390, 21986780]

約数ペア:

[(1, 21986780), (2, 10993390), (4, 5496695), (5, 4397356), (10, 2198678), (17, 1293340), (20, 1099339), (34, 646670), (68, 323335), (85, 258668), (170, 129334), (340, 64667)]