21257028

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{857}}^1$

素因数の和:933

約数の個数: 72

約数和(自身を含む): 59026968

約数和(自身を除く): 37769940

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 53, 78, 106, 117, 156, 159, 212, 234, 318, 468, 477, 636, 689, 857, 954, 1378, 1714, 1908, 2067, 2571, 2756, 3428, 4134, 5142, 6201, 7713, 8268, 10284, 11141, 12402, 15426, 22282, 24804, 30852, 33423, 44564, 45421, 66846, 90842, 100269, 133692, 136263, 181684, 200538, 272526, 401076, 408789, 545052, 590473, 817578, 1180946, 1635156, 1771419, 2361892, 3542838, 5314257, 7085676, 10628514, 21257028]

約数ペア:

[(1, 21257028), (2, 10628514), (3, 7085676), (4, 5314257), (6, 3542838), (9, 2361892), (12, 1771419), (13, 1635156), (18, 1180946), (26, 817578), (36, 590473), (39, 545052), (52, 408789), (53, 401076), (78, 272526), (106, 200538), (117, 181684), (156, 136263), (159, 133692), (212, 100269), (234, 90842), (318, 66846), (468, 45421), (477, 44564), (636, 33423), (689, 30852), (857, 24804), (954, 22282), (1378, 15426), (1714, 12402), (1908, 11141), (2067, 10284), (2571, 8268), (2756, 7713), (3428, 6201), (4134, 5142)]