21395528

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{739}}^1$

素因数の和:810

約数の個数: 64

約数和(自身を含む): 51148800

約数和(自身を除く): 29753272

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 47, 56, 77, 88, 94, 154, 188, 308, 329, 376, 517, 616, 658, 739, 1034, 1316, 1478, 2068, 2632, 2956, 3619, 4136, 5173, 5912, 7238, 8129, 10346, 14476, 16258, 20692, 28952, 32516, 34733, 41384, 56903, 65032, 69466, 113806, 138932, 227612, 243131, 277864, 382063, 455224, 486262, 764126, 972524, 1528252, 1945048, 2674441, 3056504, 5348882, 10697764, 21395528]

約数ペア:

[(1, 21395528), (2, 10697764), (4, 5348882), (7, 3056504), (8, 2674441), (11, 1945048), (14, 1528252), (22, 972524), (28, 764126), (44, 486262), (47, 455224), (56, 382063), (77, 277864), (88, 243131), (94, 227612), (154, 138932), (188, 113806), (308, 69466), (329, 65032), (376, 56903), (517, 41384), (616, 34733), (658, 32516), (739, 28952), (1034, 20692), (1316, 16258), (1478, 14476), (2068, 10346), (2632, 8129), (2956, 7238), (3619, 5912), (4136, 5173)]