21385864

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{2347}}^1$

素因数の和:2437

約数の個数: 32

約数和(自身を含む): 43109280

約数和(自身を除く): 21723416

約数列:

[1, 2, 4, 8, 17, 34, 67, 68, 134, 136, 268, 536, 1139, 2278, 2347, 4556, 4694, 9112, 9388, 18776, 39899, 79798, 157249, 159596, 314498, 319192, 628996, 1257992, 2673233, 5346466, 10692932, 21385864]

約数ペア:

[(1, 21385864), (2, 10692932), (4, 5346466), (8, 2673233), (17, 1257992), (34, 628996), (67, 319192), (68, 314498), (134, 159596), (136, 157249), (268, 79798), (536, 39899), (1139, 18776), (2278, 9388), (2347, 9112), (4556, 4694)]