21039772

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{1301}}^1$

素因数の和:1629

約数の個数: 24

約数和(自身を含む): 39809952

約数和(自身を除く): 18770180

約数列:

[1, 2, 4, 13, 26, 52, 311, 622, 1244, 1301, 2602, 4043, 5204, 8086, 16172, 16913, 33826, 67652, 404611, 809222, 1618444, 5259943, 10519886, 21039772]

約数ペア:

[(1, 21039772), (2, 10519886), (4, 5259943), (13, 1618444), (26, 809222), (52, 404611), (311, 67652), (622, 33826), (1244, 16913), (1301, 16172), (2602, 8086), (4043, 5204)]