18328180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{449}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 41806800

約数和(自身を除く): 23478620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 449, 628, 785, 898, 1570, 1796, 2041, 2245, 3140, 4082, 4490, 5837, 8164, 8980, 10205, 11674, 20410, 23348, 29185, 40820, 58370, 70493, 116740, 140986, 281972, 352465, 704930, 916409, 1409860, 1832818, 3665636, 4582045, 9164090, 18328180]

約数ペア:

[(1, 18328180), (2, 9164090), (4, 4582045), (5, 3665636), (10, 1832818), (13, 1409860), (20, 916409), (26, 704930), (52, 352465), (65, 281972), (130, 140986), (157, 116740), (260, 70493), (314, 58370), (449, 40820), (628, 29185), (785, 23348), (898, 20410), (1570, 11674), (1796, 10205), (2041, 8980), (2245, 8164), (3140, 5837), (4082, 4490)]