81860480

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9839}}^1$

素因数の和:9871

約数の個数: 64

約数和(自身を含む): 210772800

約数和(自身を除く): 128912320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 4160, 8320, 9839, 19678, 39356, 49195, 78712, 98390, 127907, 157424, 196780, 255814, 314848, 393560, 511628, 629696, 639535, 787120, 1023256, 1259392, 1279070, 1574240, 2046512, 2558140, 3148480, 4093024, 5116280, 6296960, 8186048, 10232560, 16372096, 20465120, 40930240, 81860480]

約数ペア:

[(1, 81860480), (2, 40930240), (4, 20465120), (5, 16372096), (8, 10232560), (10, 8186048), (13, 6296960), (16, 5116280), (20, 4093024), (26, 3148480), (32, 2558140), (40, 2046512), (52, 1574240), (64, 1279070), (65, 1259392), (80, 1023256), (104, 787120), (128, 639535), (130, 629696), (160, 511628), (208, 393560), (260, 314848), (320, 255814), (416, 196780), (520, 157424), (640, 127907), (832, 98390), (1040, 78712), (1664, 49195), (2080, 39356), (4160, 19678), (8320, 9839)]