21479080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1871}}^1$

素因数の和:1930

約数の個数: 64

約数和(自身を含む): 56609280

約数和(自身を除く): 35130200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 56, 70, 82, 140, 164, 205, 280, 287, 328, 410, 574, 820, 1148, 1435, 1640, 1871, 2296, 2870, 3742, 5740, 7484, 9355, 11480, 13097, 14968, 18710, 26194, 37420, 52388, 65485, 74840, 76711, 104776, 130970, 153422, 261940, 306844, 383555, 523880, 536977, 613688, 767110, 1073954, 1534220, 2147908, 2684885, 3068440, 4295816, 5369770, 10739540, 21479080]

約数ペア:

[(1, 21479080), (2, 10739540), (4, 5369770), (5, 4295816), (7, 3068440), (8, 2684885), (10, 2147908), (14, 1534220), (20, 1073954), (28, 767110), (35, 613688), (40, 536977), (41, 523880), (56, 383555), (70, 306844), (82, 261940), (140, 153422), (164, 130970), (205, 104776), (280, 76711), (287, 74840), (328, 65485), (410, 52388), (574, 37420), (820, 26194), (1148, 18710), (1435, 14968), (1640, 13097), (1871, 11480), (2296, 9355), (2870, 7484), (3742, 5740)]