21542510

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:201

約数の個数: 64

約数和(自身を含む): 44651520

約数和(自身を除く): 23109010

約数列:

[1, 2, 5, 10, 11, 22, 37, 55, 67, 74, 79, 110, 134, 158, 185, 335, 370, 395, 407, 670, 737, 790, 814, 869, 1474, 1738, 2035, 2479, 2923, 3685, 4070, 4345, 4958, 5293, 5846, 7370, 8690, 10586, 12395, 14615, 24790, 26465, 27269, 29230, 32153, 52930, 54538, 58223, 64306, 116446, 136345, 160765, 195841, 272690, 291115, 321530, 391682, 582230, 979205, 1958410, 2154251, 4308502, 10771255, 21542510]

約数ペア:

[(1, 21542510), (2, 10771255), (5, 4308502), (10, 2154251), (11, 1958410), (22, 979205), (37, 582230), (55, 391682), (67, 321530), (74, 291115), (79, 272690), (110, 195841), (134, 160765), (158, 136345), (185, 116446), (335, 64306), (370, 58223), (395, 54538), (407, 52930), (670, 32153), (737, 29230), (790, 27269), (814, 26465), (869, 24790), (1474, 14615), (1738, 12395), (2035, 10586), (2479, 8690), (2923, 7370), (3685, 5846), (4070, 5293), (4345, 4958)]