19994949

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 33022080

約数和(自身を除く): 13027131

約数列:

[1, 3, 9, 13, 29, 39, 71, 83, 87, 117, 213, 249, 261, 377, 639, 747, 923, 1079, 1131, 2059, 2407, 2769, 3237, 3393, 5893, 6177, 7221, 8307, 9711, 17679, 18531, 21663, 26767, 31291, 53037, 76609, 80301, 93873, 170897, 229827, 240903, 281619, 512691, 689481, 1538073, 2221661, 6664983, 19994949]

約数ペア:

[(1, 19994949), (3, 6664983), (9, 2221661), (13, 1538073), (29, 689481), (39, 512691), (71, 281619), (83, 240903), (87, 229827), (117, 170897), (213, 93873), (249, 80301), (261, 76609), (377, 53037), (639, 31291), (747, 26767), (923, 21663), (1079, 18531), (1131, 17679), (2059, 9711), (2407, 8307), (2769, 7221), (3237, 6177), (3393, 5893)]