21906848

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{263}}^1$

素因数の和:429

約数の個数: 48

約数和(自身を含む): 45904320

約数和(自身を除く): 23997472

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 137, 152, 263, 274, 304, 526, 548, 608, 1052, 1096, 2104, 2192, 2603, 4208, 4384, 4997, 5206, 8416, 9994, 10412, 19988, 20824, 36031, 39976, 41648, 72062, 79952, 83296, 144124, 159904, 288248, 576496, 684589, 1152992, 1369178, 2738356, 5476712, 10953424, 21906848]

約数ペア:

[(1, 21906848), (2, 10953424), (4, 5476712), (8, 2738356), (16, 1369178), (19, 1152992), (32, 684589), (38, 576496), (76, 288248), (137, 159904), (152, 144124), (263, 83296), (274, 79952), (304, 72062), (526, 41648), (548, 39976), (608, 36031), (1052, 20824), (1096, 19988), (2104, 10412), (2192, 9994), (2603, 8416), (4208, 5206), (4384, 4997)]