81901360

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11503}}^1$

素因数の和:11605

約数の個数: 40

約数和(自身を含む): 192576960

約数和(自身を除く): 110675600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120, 11503, 23006, 46012, 57515, 92024, 115030, 184048, 230060, 460120, 920240, 1023767, 2047534, 4095068, 5118835, 8190136, 10237670, 16380272, 20475340, 40950680, 81901360]

約数ペア:

[(1, 81901360), (2, 40950680), (4, 20475340), (5, 16380272), (8, 10237670), (10, 8190136), (16, 5118835), (20, 4095068), (40, 2047534), (80, 1023767), (89, 920240), (178, 460120), (356, 230060), (445, 184048), (712, 115030), (890, 92024), (1424, 57515), (1780, 46012), (3560, 23006), (7120, 11503)]