40987820

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 88216128

約数和(自身を除く): 47228308

約数列:

[1, 2, 4, 5, 10, 20, 101, 103, 197, 202, 206, 394, 404, 412, 505, 515, 788, 985, 1010, 1030, 1970, 2020, 2060, 3940, 10403, 19897, 20291, 20806, 39794, 40582, 41612, 52015, 79588, 81164, 99485, 101455, 104030, 198970, 202910, 208060, 397940, 405820, 2049391, 4098782, 8197564, 10246955, 20493910, 40987820]

約数ペア:

[(1, 40987820), (2, 20493910), (4, 10246955), (5, 8197564), (10, 4098782), (20, 2049391), (101, 405820), (103, 397940), (197, 208060), (202, 202910), (206, 198970), (394, 104030), (404, 101455), (412, 99485), (505, 81164), (515, 79588), (788, 52015), (985, 41612), (1010, 40582), (1030, 39794), (1970, 20806), (2020, 20291), (2060, 19897), (3940, 10403)]