13281020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{691}}^1$

素因数の和:762

約数の個数: 36

約数和(自身を含む): 28860552

約数和(自身を除く): 15579532

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 691, 961, 1382, 1922, 2764, 3455, 3844, 4805, 6910, 9610, 13820, 19220, 21421, 42842, 85684, 107105, 214210, 428420, 664051, 1328102, 2656204, 3320255, 6640510, 13281020]

約数ペア:

[(1, 13281020), (2, 6640510), (4, 3320255), (5, 2656204), (10, 1328102), (20, 664051), (31, 428420), (62, 214210), (124, 107105), (155, 85684), (310, 42842), (620, 21421), (691, 19220), (961, 13820), (1382, 9610), (1922, 6910), (2764, 4805), (3455, 3844)]