19798640

素因数分解:

$2^4\times 5^1\times {\mathrm{263}}^1\times {\mathrm{941}}^1$

素因数の和:1217

約数の個数: 40

約数和(自身を含む): 46255968

約数和(自身を除く): 26457328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263, 526, 941, 1052, 1315, 1882, 2104, 2630, 3764, 4208, 4705, 5260, 7528, 9410, 10520, 15056, 18820, 21040, 37640, 75280, 247483, 494966, 989932, 1237415, 1979864, 2474830, 3959728, 4949660, 9899320, 19798640]

約数ペア:

[(1, 19798640), (2, 9899320), (4, 4949660), (5, 3959728), (8, 2474830), (10, 1979864), (16, 1237415), (20, 989932), (40, 494966), (80, 247483), (263, 75280), (526, 37640), (941, 21040), (1052, 18820), (1315, 15056), (1882, 10520), (2104, 9410), (2630, 7528), (3764, 5260), (4208, 4705)]