21626720

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7951}}^1$

素因数の和:7983

約数の個数: 48

約数和(自身を含む): 54105408

約数和(自身を除く): 32478688

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7951, 15902, 31804, 39755, 63608, 79510, 127216, 135167, 159020, 254432, 270334, 318040, 540668, 636080, 675835, 1081336, 1272160, 1351670, 2162672, 2703340, 4325344, 5406680, 10813360, 21626720]

約数ペア:

[(1, 21626720), (2, 10813360), (4, 5406680), (5, 4325344), (8, 2703340), (10, 2162672), (16, 1351670), (17, 1272160), (20, 1081336), (32, 675835), (34, 636080), (40, 540668), (68, 318040), (80, 270334), (85, 254432), (136, 159020), (160, 135167), (170, 127216), (272, 79510), (340, 63608), (544, 39755), (680, 31804), (1360, 15902), (2720, 7951)]