217403720

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{187417}}^1$

素因数の和:187457

約数の個数: 32

約数和(自身を含む): 506028600

約数和(自身を除く): 288624880

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 187417, 374834, 749668, 937085, 1499336, 1874170, 3748340, 5435093, 7496680, 10870186, 21740372, 27175465, 43480744, 54350930, 108701860, 217403720]

約数ペア:

[(1, 217403720), (2, 108701860), (4, 54350930), (5, 43480744), (8, 27175465), (10, 21740372), (20, 10870186), (29, 7496680), (40, 5435093), (58, 3748340), (116, 1874170), (145, 1499336), (232, 937085), (290, 749668), (580, 374834), (1160, 187417)]