81577880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{1103}}^1$

素因数の和:1200

約数の個数: 48

約数和(自身を含む): 188088480

約数和(自身を除く): 106510600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1103, 1720, 1849, 2206, 3698, 4412, 5515, 7396, 8824, 9245, 11030, 14792, 18490, 22060, 36980, 44120, 47429, 73960, 94858, 189716, 237145, 379432, 474290, 948580, 1897160, 2039447, 4078894, 8157788, 10197235, 16315576, 20394470, 40788940, 81577880]

約数ペア:

[(1, 81577880), (2, 40788940), (4, 20394470), (5, 16315576), (8, 10197235), (10, 8157788), (20, 4078894), (40, 2039447), (43, 1897160), (86, 948580), (172, 474290), (215, 379432), (344, 237145), (430, 189716), (860, 94858), (1103, 73960), (1720, 47429), (1849, 44120), (2206, 36980), (3698, 22060), (4412, 18490), (5515, 14792), (7396, 11030), (8824, 9245)]