21263308

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{353}}^1$

素因数の和:442

約数の個数: 36

約数和(自身を含む): 41838552

約数和(自身を除く): 20575244

約数列:

[1, 2, 4, 11, 22, 37, 44, 74, 148, 353, 407, 706, 814, 1369, 1412, 1628, 2738, 3883, 5476, 7766, 13061, 15059, 15532, 26122, 30118, 52244, 60236, 143671, 287342, 483257, 574684, 966514, 1933028, 5315827, 10631654, 21263308]

約数ペア:

[(1, 21263308), (2, 10631654), (4, 5315827), (11, 1933028), (22, 966514), (37, 574684), (44, 483257), (74, 287342), (148, 143671), (353, 60236), (407, 52244), (706, 30118), (814, 26122), (1369, 15532), (1412, 15059), (1628, 13061), (2738, 7766), (3883, 5476)]