21939568

素因数分解:

$2^4\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:206

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 29485712

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 56, 62, 71, 89, 112, 124, 142, 178, 217, 248, 284, 356, 434, 496, 497, 568, 623, 712, 868, 994, 1136, 1246, 1424, 1736, 1988, 2201, 2492, 2759, 3472, 3976, 4402, 4984, 5518, 6319, 7952, 8804, 9968, 11036, 12638, 15407, 17608, 19313, 22072, 25276, 30814, 35216, 38626, 44144, 44233, 50552, 61628, 77252, 88466, 101104, 123256, 154504, 176932, 195889, 246512, 309008, 353864, 391778, 707728, 783556, 1371223, 1567112, 2742446, 3134224, 5484892, 10969784, 21939568]

約数ペア:

[(1, 21939568), (2, 10969784), (4, 5484892), (7, 3134224), (8, 2742446), (14, 1567112), (16, 1371223), (28, 783556), (31, 707728), (56, 391778), (62, 353864), (71, 309008), (89, 246512), (112, 195889), (124, 176932), (142, 154504), (178, 123256), (217, 101104), (248, 88466), (284, 77252), (356, 61628), (434, 50552), (496, 44233), (497, 44144), (568, 38626), (623, 35216), (712, 30814), (868, 25276), (994, 22072), (1136, 19313), (1246, 17608), (1424, 15407), (1736, 12638), (1988, 11036), (2201, 9968), (2492, 8804), (2759, 7952), (3472, 6319), (3976, 5518), (4402, 4984)]