21006918

素因数分解:

$2^1\times 3^3\times {\mathrm{73}}^3$

素因数の和:230

約数の個数: 32

約数和(自身を含む): 47330400

約数和(自身を除く): 26323482

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 73, 146, 219, 438, 657, 1314, 1971, 3942, 5329, 10658, 15987, 31974, 47961, 95922, 143883, 287766, 389017, 778034, 1167051, 2334102, 3501153, 7002306, 10503459, 21006918]

約数ペア:

[(1, 21006918), (2, 10503459), (3, 7002306), (6, 3501153), (9, 2334102), (18, 1167051), (27, 778034), (54, 389017), (73, 287766), (146, 143883), (219, 95922), (438, 47961), (657, 31974), (1314, 15987), (1971, 10658), (3942, 5329)]