21000056

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{467}}^1$

素因数の和:564

約数の個数: 64

約数和(自身を含む): 49870080

約数和(自身を除く): 28870024

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 73, 77, 88, 146, 154, 292, 308, 467, 511, 584, 616, 803, 934, 1022, 1606, 1868, 2044, 3212, 3269, 3736, 4088, 5137, 5621, 6424, 6538, 10274, 11242, 13076, 20548, 22484, 26152, 34091, 35959, 41096, 44968, 68182, 71918, 136364, 143836, 238637, 272728, 287672, 375001, 477274, 750002, 954548, 1500004, 1909096, 2625007, 3000008, 5250014, 10500028, 21000056]

約数ペア:

[(1, 21000056), (2, 10500028), (4, 5250014), (7, 3000008), (8, 2625007), (11, 1909096), (14, 1500004), (22, 954548), (28, 750002), (44, 477274), (56, 375001), (73, 287672), (77, 272728), (88, 238637), (146, 143836), (154, 136364), (292, 71918), (308, 68182), (467, 44968), (511, 41096), (584, 35959), (616, 34091), (803, 26152), (934, 22484), (1022, 20548), (1606, 13076), (1868, 11242), (2044, 10274), (3212, 6538), (3269, 6424), (3736, 5621), (4088, 5137)]