21231756

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{6481}}^1$

素因数の和:6511

約数の個数: 72

約数和(自身を含む): 66064544

約数和(自身を除く): 44832788

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 13, 14, 18, 21, 26, 28, 36, 39, 42, 52, 63, 78, 84, 91, 117, 126, 156, 182, 234, 252, 273, 364, 468, 546, 819, 1092, 1638, 3276, 6481, 12962, 19443, 25924, 38886, 45367, 58329, 77772, 84253, 90734, 116658, 136101, 168506, 181468, 233316, 252759, 272202, 337012, 408303, 505518, 544404, 589771, 758277, 816606, 1011036, 1179542, 1516554, 1633212, 1769313, 2359084, 3033108, 3538626, 5307939, 7077252, 10615878, 21231756]

約数ペア:

[(1, 21231756), (2, 10615878), (3, 7077252), (4, 5307939), (6, 3538626), (7, 3033108), (9, 2359084), (12, 1769313), (13, 1633212), (14, 1516554), (18, 1179542), (21, 1011036), (26, 816606), (28, 758277), (36, 589771), (39, 544404), (42, 505518), (52, 408303), (63, 337012), (78, 272202), (84, 252759), (91, 233316), (117, 181468), (126, 168506), (156, 136101), (182, 116658), (234, 90734), (252, 84253), (273, 77772), (364, 58329), (468, 45367), (546, 38886), (819, 25924), (1092, 19443), (1638, 12962), (3276, 6481)]