21057616

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{241}}^1$

素因数の和:419

約数の個数: 40

約数和(自身を含む): 42251264

約数和(自身を除く): 21193648

約数列:

[1, 2, 4, 8, 16, 43, 86, 127, 172, 241, 254, 344, 482, 508, 688, 964, 1016, 1928, 2032, 3856, 5461, 10363, 10922, 20726, 21844, 30607, 41452, 43688, 61214, 82904, 87376, 122428, 165808, 244856, 489712, 1316101, 2632202, 5264404, 10528808, 21057616]

約数ペア:

[(1, 21057616), (2, 10528808), (4, 5264404), (8, 2632202), (16, 1316101), (43, 489712), (86, 244856), (127, 165808), (172, 122428), (241, 87376), (254, 82904), (344, 61214), (482, 43688), (508, 41452), (688, 30607), (964, 21844), (1016, 20726), (1928, 10922), (2032, 10363), (3856, 5461)]