21891996

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{797}}^1$

素因数の和:923

約数の個数: 72

約数和(自身を含む): 63903840

約数和(自身を除く): 42011844

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 109, 126, 218, 252, 327, 436, 654, 763, 797, 981, 1308, 1526, 1594, 1962, 2289, 2391, 3052, 3188, 3924, 4578, 4782, 5579, 6867, 7173, 9156, 9564, 11158, 13734, 14346, 16737, 22316, 27468, 28692, 33474, 50211, 66948, 86873, 100422, 173746, 200844, 260619, 347492, 521238, 608111, 781857, 1042476, 1216222, 1563714, 1824333, 2432444, 3127428, 3648666, 5472999, 7297332, 10945998, 21891996]

約数ペア:

[(1, 21891996), (2, 10945998), (3, 7297332), (4, 5472999), (6, 3648666), (7, 3127428), (9, 2432444), (12, 1824333), (14, 1563714), (18, 1216222), (21, 1042476), (28, 781857), (36, 608111), (42, 521238), (63, 347492), (84, 260619), (109, 200844), (126, 173746), (218, 100422), (252, 86873), (327, 66948), (436, 50211), (654, 33474), (763, 28692), (797, 27468), (981, 22316), (1308, 16737), (1526, 14346), (1594, 13734), (1962, 11158), (2289, 9564), (2391, 9156), (3052, 7173), (3188, 6867), (3924, 5579), (4578, 4782)]