21064720

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1471}}^1$

素因数の和:1663

約数の個数: 40

約数和(自身を含む): 49282560

約数和(自身を除く): 28217840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1432, 1471, 1790, 2864, 2942, 3580, 5884, 7160, 7355, 11768, 14320, 14710, 23536, 29420, 58840, 117680, 263309, 526618, 1053236, 1316545, 2106472, 2633090, 4212944, 5266180, 10532360, 21064720]

約数ペア:

[(1, 21064720), (2, 10532360), (4, 5266180), (5, 4212944), (8, 2633090), (10, 2106472), (16, 1316545), (20, 1053236), (40, 526618), (80, 263309), (179, 117680), (358, 58840), (716, 29420), (895, 23536), (1432, 14710), (1471, 14320), (1790, 11768), (2864, 7355), (2942, 7160), (3580, 5884)]