21081996

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{421}}^1$

素因数の和:551

約数の個数: 72

約数和(自身を含む): 58063824

約数和(自身を除く): 36981828

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 107, 117, 156, 214, 234, 321, 421, 428, 468, 642, 842, 963, 1263, 1284, 1391, 1684, 1926, 2526, 2782, 3789, 3852, 4173, 5052, 5473, 5564, 7578, 8346, 10946, 12519, 15156, 16419, 16692, 21892, 25038, 32838, 45047, 49257, 50076, 65676, 90094, 98514, 135141, 180188, 197028, 270282, 405423, 540564, 585611, 810846, 1171222, 1621692, 1756833, 2342444, 3513666, 5270499, 7027332, 10540998, 21081996]

約数ペア:

[(1, 21081996), (2, 10540998), (3, 7027332), (4, 5270499), (6, 3513666), (9, 2342444), (12, 1756833), (13, 1621692), (18, 1171222), (26, 810846), (36, 585611), (39, 540564), (52, 405423), (78, 270282), (107, 197028), (117, 180188), (156, 135141), (214, 98514), (234, 90094), (321, 65676), (421, 50076), (428, 49257), (468, 45047), (642, 32838), (842, 25038), (963, 21892), (1263, 16692), (1284, 16419), (1391, 15156), (1684, 12519), (1926, 10946), (2526, 8346), (2782, 7578), (3789, 5564), (3852, 5473), (4173, 5052)]