21349844

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 41395200

約数和(自身を除く): 20045356

約数列:

[1, 2, 4, 19, 38, 43, 47, 76, 86, 94, 139, 172, 188, 278, 556, 817, 893, 1634, 1786, 2021, 2641, 3268, 3572, 4042, 5282, 5977, 6533, 8084, 10564, 11954, 13066, 23908, 26132, 38399, 76798, 113563, 124127, 153596, 227126, 248254, 280919, 454252, 496508, 561838, 1123676, 5337461, 10674922, 21349844]

約数ペア:

[(1, 21349844), (2, 10674922), (4, 5337461), (19, 1123676), (38, 561838), (43, 496508), (47, 454252), (76, 280919), (86, 248254), (94, 227126), (139, 153596), (172, 124127), (188, 113563), (278, 76798), (556, 38399), (817, 26132), (893, 23908), (1634, 13066), (1786, 11954), (2021, 10564), (2641, 8084), (3268, 6533), (3572, 5977), (4042, 5282)]