21356055

素因数分解:

$3^9\times 5^1\times 7^1\times {\mathrm{31}}^1$

素因数の和:70

約数の個数: 80

約数和(自身を含む): 45348864

約数和(自身を除く): 23992809

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 31, 35, 45, 63, 81, 93, 105, 135, 155, 189, 217, 243, 279, 315, 405, 465, 567, 651, 729, 837, 945, 1085, 1215, 1395, 1701, 1953, 2187, 2511, 2835, 3255, 3645, 4185, 5103, 5859, 6561, 7533, 8505, 9765, 10935, 12555, 15309, 17577, 19683, 22599, 25515, 29295, 32805, 37665, 45927, 52731, 67797, 76545, 87885, 98415, 112995, 137781, 158193, 203391, 229635, 263655, 338985, 474579, 610173, 688905, 790965, 1016955, 1423737, 2372895, 3050865, 4271211, 7118685, 21356055]

約数ペア:

[(1, 21356055), (3, 7118685), (5, 4271211), (7, 3050865), (9, 2372895), (15, 1423737), (21, 1016955), (27, 790965), (31, 688905), (35, 610173), (45, 474579), (63, 338985), (81, 263655), (93, 229635), (105, 203391), (135, 158193), (155, 137781), (189, 112995), (217, 98415), (243, 87885), (279, 76545), (315, 67797), (405, 52731), (465, 45927), (567, 37665), (651, 32805), (729, 29295), (837, 25515), (945, 22599), (1085, 19683), (1215, 17577), (1395, 15309), (1701, 12555), (1953, 10935), (2187, 9765), (2511, 8505), (2835, 7533), (3255, 6561), (3645, 5859), (4185, 5103)]