21405680

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5693}}^1$

素因数の和:5753

約数の個数: 40

約数和(自身を含む): 50836032

約数和(自身を除く): 29430352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5693, 11386, 22772, 28465, 45544, 56930, 91088, 113860, 227720, 267571, 455440, 535142, 1070284, 1337855, 2140568, 2675710, 4281136, 5351420, 10702840, 21405680]

約数ペア:

[(1, 21405680), (2, 10702840), (4, 5351420), (5, 4281136), (8, 2675710), (10, 2140568), (16, 1337855), (20, 1070284), (40, 535142), (47, 455440), (80, 267571), (94, 227720), (188, 113860), (235, 91088), (376, 56930), (470, 45544), (752, 28465), (940, 22772), (1880, 11386), (3760, 5693)]