21064131

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{503}}^1$

素因数の和:573

約数の個数: 40

約数和(自身を含む): 35126784

約数和(自身を除く): 14062653

約数列:

[1, 3, 9, 11, 27, 33, 47, 81, 99, 141, 297, 423, 503, 517, 891, 1269, 1509, 1551, 3807, 4527, 4653, 5533, 13581, 13959, 16599, 23641, 40743, 41877, 49797, 70923, 149391, 212769, 260051, 448173, 638307, 780153, 1914921, 2340459, 7021377, 21064131]

約数ペア:

[(1, 21064131), (3, 7021377), (9, 2340459), (11, 1914921), (27, 780153), (33, 638307), (47, 448173), (81, 260051), (99, 212769), (141, 149391), (297, 70923), (423, 49797), (503, 41877), (517, 40743), (891, 23641), (1269, 16599), (1509, 13959), (1551, 13581), (3807, 5533), (4527, 4653)]