21490308

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{797}}^1$

素因数の和:921

約数の個数: 72

約数和(自身を含む): 62741952

約数和(自身を除く): 41251644

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 107, 126, 214, 252, 321, 428, 642, 749, 797, 963, 1284, 1498, 1594, 1926, 2247, 2391, 2996, 3188, 3852, 4494, 4782, 5579, 6741, 7173, 8988, 9564, 11158, 13482, 14346, 16737, 22316, 26964, 28692, 33474, 50211, 66948, 85279, 100422, 170558, 200844, 255837, 341116, 511674, 596953, 767511, 1023348, 1193906, 1535022, 1790859, 2387812, 3070044, 3581718, 5372577, 7163436, 10745154, 21490308]

約数ペア:

[(1, 21490308), (2, 10745154), (3, 7163436), (4, 5372577), (6, 3581718), (7, 3070044), (9, 2387812), (12, 1790859), (14, 1535022), (18, 1193906), (21, 1023348), (28, 767511), (36, 596953), (42, 511674), (63, 341116), (84, 255837), (107, 200844), (126, 170558), (214, 100422), (252, 85279), (321, 66948), (428, 50211), (642, 33474), (749, 28692), (797, 26964), (963, 22316), (1284, 16737), (1498, 14346), (1594, 13482), (1926, 11158), (2247, 9564), (2391, 8988), (2996, 7173), (3188, 6741), (3852, 5579), (4494, 4782)]