21338757

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:474

約数の個数: 48

約数和(自身を含む): 36840960

約数和(自身を除く): 15502203

約数列:

[1, 3, 9, 11, 17, 31, 33, 51, 93, 99, 153, 187, 279, 341, 409, 527, 561, 1023, 1227, 1581, 1683, 3069, 3681, 4499, 4743, 5797, 6953, 12679, 13497, 17391, 20859, 38037, 40491, 52173, 62577, 76483, 114111, 139469, 215543, 229449, 418407, 646629, 688347, 1255221, 1939887, 2370973, 7112919, 21338757]

約数ペア:

[(1, 21338757), (3, 7112919), (9, 2370973), (11, 1939887), (17, 1255221), (31, 688347), (33, 646629), (51, 418407), (93, 229449), (99, 215543), (153, 139469), (187, 114111), (279, 76483), (341, 62577), (409, 52173), (527, 40491), (561, 38037), (1023, 20859), (1227, 17391), (1581, 13497), (1683, 12679), (3069, 6953), (3681, 5797), (4499, 4743)]