20391500

素因数分解:

$2^2\times 5^3\times {\mathrm{17}}^1\times {\mathrm{2399}}^1$

素因数の和:2435

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 26782900

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 125, 170, 250, 340, 425, 500, 850, 1700, 2125, 2399, 4250, 4798, 8500, 9596, 11995, 23990, 40783, 47980, 59975, 81566, 119950, 163132, 203915, 239900, 299875, 407830, 599750, 815660, 1019575, 1199500, 2039150, 4078300, 5097875, 10195750, 20391500]

約数ペア:

[(1, 20391500), (2, 10195750), (4, 5097875), (5, 4078300), (10, 2039150), (17, 1199500), (20, 1019575), (25, 815660), (34, 599750), (50, 407830), (68, 299875), (85, 239900), (100, 203915), (125, 163132), (170, 119950), (250, 81566), (340, 59975), (425, 47980), (500, 40783), (850, 23990), (1700, 11995), (2125, 9596), (2399, 8500), (4250, 4798)]