20480900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{433}}^1$

素因数の和:501

約数の個数: 72

約数和(自身を含む): 49725984

約数和(自身を除く): 29245084

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 43, 44, 50, 55, 86, 100, 110, 172, 215, 220, 275, 430, 433, 473, 550, 860, 866, 946, 1075, 1100, 1732, 1892, 2150, 2165, 2365, 4300, 4330, 4730, 4763, 8660, 9460, 9526, 10825, 11825, 18619, 19052, 21650, 23650, 23815, 37238, 43300, 47300, 47630, 74476, 93095, 95260, 119075, 186190, 204809, 238150, 372380, 409618, 465475, 476300, 819236, 930950, 1024045, 1861900, 2048090, 4096180, 5120225, 10240450, 20480900]

約数ペア:

[(1, 20480900), (2, 10240450), (4, 5120225), (5, 4096180), (10, 2048090), (11, 1861900), (20, 1024045), (22, 930950), (25, 819236), (43, 476300), (44, 465475), (50, 409618), (55, 372380), (86, 238150), (100, 204809), (110, 186190), (172, 119075), (215, 95260), (220, 93095), (275, 74476), (430, 47630), (433, 47300), (473, 43300), (550, 37238), (860, 23815), (866, 23650), (946, 21650), (1075, 19052), (1100, 18619), (1732, 11825), (1892, 10825), (2150, 9526), (2165, 9460), (2365, 8660), (4300, 4763), (4330, 4730)]