21524013

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 37380096

約数和(自身を除く): 15856083

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 103, 107, 217, 279, 309, 321, 651, 721, 749, 927, 963, 1953, 2163, 2247, 3193, 3317, 6489, 6741, 9579, 9951, 11021, 22351, 23219, 28737, 29853, 33063, 67053, 69657, 77147, 99189, 201159, 208971, 231441, 341651, 694323, 1024953, 2391557, 3074859, 7174671, 21524013]

約数ペア:

[(1, 21524013), (3, 7174671), (7, 3074859), (9, 2391557), (21, 1024953), (31, 694323), (63, 341651), (93, 231441), (103, 208971), (107, 201159), (217, 99189), (279, 77147), (309, 69657), (321, 67053), (651, 33063), (721, 29853), (749, 28737), (927, 23219), (963, 22351), (1953, 11021), (2163, 9951), (2247, 9579), (3193, 6741), (3317, 6489)]