81285440

素因数分解:

$2^6\times 5^1\times {\mathrm{389}}^1\times {\mathrm{653}}^1$

素因数の和:1059

約数の個数: 56

約数和(自身を含む): 194355720

約数和(自身を除く): 113070280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 389, 653, 778, 1306, 1556, 1945, 2612, 3112, 3265, 3890, 5224, 6224, 6530, 7780, 10448, 12448, 13060, 15560, 20896, 24896, 26120, 31120, 41792, 52240, 62240, 104480, 124480, 208960, 254017, 508034, 1016068, 1270085, 2032136, 2540170, 4064272, 5080340, 8128544, 10160680, 16257088, 20321360, 40642720, 81285440]

約数ペア:

[(1, 81285440), (2, 40642720), (4, 20321360), (5, 16257088), (8, 10160680), (10, 8128544), (16, 5080340), (20, 4064272), (32, 2540170), (40, 2032136), (64, 1270085), (80, 1016068), (160, 508034), (320, 254017), (389, 208960), (653, 124480), (778, 104480), (1306, 62240), (1556, 52240), (1945, 41792), (2612, 31120), (3112, 26120), (3265, 24896), (3890, 20896), (5224, 15560), (6224, 13060), (6530, 12448), (7780, 10448)]