21036280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{127}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 28315400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 101, 127, 164, 202, 205, 254, 328, 404, 410, 505, 508, 635, 808, 820, 1010, 1016, 1270, 1640, 2020, 2540, 4040, 4141, 5080, 5207, 8282, 10414, 12827, 16564, 20705, 20828, 25654, 26035, 33128, 41410, 41656, 51308, 52070, 64135, 82820, 102616, 104140, 128270, 165640, 208280, 256540, 513080, 525907, 1051814, 2103628, 2629535, 4207256, 5259070, 10518140, 21036280]

約数ペア:

[(1, 21036280), (2, 10518140), (4, 5259070), (5, 4207256), (8, 2629535), (10, 2103628), (20, 1051814), (40, 525907), (41, 513080), (82, 256540), (101, 208280), (127, 165640), (164, 128270), (202, 104140), (205, 102616), (254, 82820), (328, 64135), (404, 52070), (410, 51308), (505, 41656), (508, 41410), (635, 33128), (808, 26035), (820, 25654), (1010, 20828), (1016, 20705), (1270, 16564), (1640, 12827), (2020, 10414), (2540, 8282), (4040, 5207), (4141, 5080)]