21558724

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 42771456

約数和(自身を除く): 21212732

約数列:

[1, 2, 4, 11, 22, 44, 67, 71, 103, 134, 142, 206, 268, 284, 412, 737, 781, 1133, 1474, 1562, 2266, 2948, 3124, 4532, 4757, 6901, 7313, 9514, 13802, 14626, 19028, 27604, 29252, 52327, 75911, 80443, 104654, 151822, 160886, 209308, 303644, 321772, 489971, 979942, 1959884, 5389681, 10779362, 21558724]

約数ペア:

[(1, 21558724), (2, 10779362), (4, 5389681), (11, 1959884), (22, 979942), (44, 489971), (67, 321772), (71, 303644), (103, 209308), (134, 160886), (142, 151822), (206, 104654), (268, 80443), (284, 75911), (412, 52327), (737, 29252), (781, 27604), (1133, 19028), (1474, 14626), (1562, 13802), (2266, 9514), (2948, 7313), (3124, 6901), (4532, 4757)]