20877488

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{199}}^1$

素因数の和:369

約数の個数: 40

約数和(自身を含む): 41664000

約数和(自身を除く): 20786512

約数列:

[1, 2, 4, 8, 16, 79, 83, 158, 166, 199, 316, 332, 398, 632, 664, 796, 1264, 1328, 1592, 3184, 6557, 13114, 15721, 16517, 26228, 31442, 33034, 52456, 62884, 66068, 104912, 125768, 132136, 251536, 264272, 1304843, 2609686, 5219372, 10438744, 20877488]

約数ペア:

[(1, 20877488), (2, 10438744), (4, 5219372), (8, 2609686), (16, 1304843), (79, 264272), (83, 251536), (158, 132136), (166, 125768), (199, 104912), (316, 66068), (332, 62884), (398, 52456), (632, 33034), (664, 31442), (796, 26228), (1264, 16517), (1328, 15721), (1592, 13114), (3184, 6557)]