40578520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 94802400

約数和(自身を除く): 54223880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 109, 164, 205, 218, 227, 328, 410, 436, 454, 545, 820, 872, 908, 1090, 1135, 1640, 1816, 2180, 2270, 4360, 4469, 4540, 8938, 9080, 9307, 17876, 18614, 22345, 24743, 35752, 37228, 44690, 46535, 49486, 74456, 89380, 93070, 98972, 123715, 178760, 186140, 197944, 247430, 372280, 494860, 989720, 1014463, 2028926, 4057852, 5072315, 8115704, 10144630, 20289260, 40578520]

約数ペア:

[(1, 40578520), (2, 20289260), (4, 10144630), (5, 8115704), (8, 5072315), (10, 4057852), (20, 2028926), (40, 1014463), (41, 989720), (82, 494860), (109, 372280), (164, 247430), (205, 197944), (218, 186140), (227, 178760), (328, 123715), (410, 98972), (436, 93070), (454, 89380), (545, 74456), (820, 49486), (872, 46535), (908, 44690), (1090, 37228), (1135, 35752), (1640, 24743), (1816, 22345), (2180, 18614), (2270, 17876), (4360, 9307), (4469, 9080), (4540, 8938)]