21615580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1499}}^1$

素因数の和:1618

約数の個数: 48

約数和(自身を含む): 52416000

約数和(自身を除く): 30800420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 103, 140, 206, 412, 515, 721, 1030, 1442, 1499, 2060, 2884, 2998, 3605, 5996, 7210, 7495, 10493, 14420, 14990, 20986, 29980, 41972, 52465, 104930, 154397, 209860, 308794, 617588, 771985, 1080779, 1543970, 2161558, 3087940, 4323116, 5403895, 10807790, 21615580]

約数ペア:

[(1, 21615580), (2, 10807790), (4, 5403895), (5, 4323116), (7, 3087940), (10, 2161558), (14, 1543970), (20, 1080779), (28, 771985), (35, 617588), (70, 308794), (103, 209860), (140, 154397), (206, 104930), (412, 52465), (515, 41972), (721, 29980), (1030, 20986), (1442, 14990), (1499, 14420), (2060, 10493), (2884, 7495), (2998, 7210), (3605, 5996)]