21750010.000000000

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{347}}^1\times {\mathrm{1429}}^1$

素因数の和:1794

約数の個数: 64

約数和(自身を含む): 358300800

約数和(自身を除く): 219459160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 347, 694, 1388, 1429, 1735, 2429, 2776, 2858, 3470, 4858, 5716, 6940, 7145, 9716, 10003, 11432, 12145, 13880, 14290, 19432, 20006, 24290, 28580, 40012, 48580, 50015, 57160, 80024, 97160, 100030, 200060, 400120, 495863, 991726, 1983452, 2479315, 3471041, 3966904, 4958630, 6942082, 9917260, 13884164, 17355205, 19834520, 27768328, 34710410, 69420820, 138841640]

約数ペア:

[(1, 138841640), (2, 69420820), (4, 34710410), (5, 27768328), (7, 19834520), (8, 17355205), (10, 13884164), (14, 9917260), (20, 6942082), (28, 4958630), (35, 3966904), (40, 3471041), (56, 2479315), (70, 1983452), (140, 991726), (280, 495863), (347, 400120), (694, 200060), (1388, 100030), (1429, 97160), (1735, 80024), (2429, 57160), (2776, 50015), (2858, 48580), (3470, 40012), (4858, 28580), (5716, 24290), (6940, 20006), (7145, 19432), (9716, 14290), (10003, 13880), (11432, 12145)]