21219128

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{719}}^1$

素因数の和:780

約数の個数: 64

約数和(自身を含む): 49766400

約数和(自身を除く): 28547272

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 31, 34, 56, 62, 68, 119, 124, 136, 217, 238, 248, 434, 476, 527, 719, 868, 952, 1054, 1438, 1736, 2108, 2876, 3689, 4216, 5033, 5752, 7378, 10066, 12223, 14756, 20132, 22289, 24446, 29512, 40264, 44578, 48892, 85561, 89156, 97784, 156023, 171122, 178312, 312046, 342244, 378913, 624092, 684488, 757826, 1248184, 1515652, 2652391, 3031304, 5304782, 10609564, 21219128]

約数ペア:

[(1, 21219128), (2, 10609564), (4, 5304782), (7, 3031304), (8, 2652391), (14, 1515652), (17, 1248184), (28, 757826), (31, 684488), (34, 624092), (56, 378913), (62, 342244), (68, 312046), (119, 178312), (124, 171122), (136, 156023), (217, 97784), (238, 89156), (248, 85561), (434, 48892), (476, 44578), (527, 40264), (719, 29512), (868, 24446), (952, 22289), (1054, 20132), (1438, 14756), (1736, 12223), (2108, 10066), (2876, 7378), (3689, 5752), (4216, 5033)]