21000391616

素因数分解:

$2^6\times {\mathrm{167}}^1\times {\mathrm{1964857}}^1$

素因数の和:1965036

約数の個数: 28

約数和(自身を含む): 41922210288

約数和(自身を除く): 20921818672

約数列:

[1, 2, 4, 8, 16, 32, 64, 167, 334, 668, 1336, 2672, 5344, 10688, 1964857, 3929714, 7859428, 15718856, 31437712, 62875424, 125750848, 328131119, 656262238, 1312524476, 2625048952, 5250097904, 10500195808, 21000391616]

約数ペア:

[(1, 21000391616), (2, 10500195808), (4, 5250097904), (8, 2625048952), (16, 1312524476), (32, 656262238), (64, 328131119), (167, 125750848), (334, 62875424), (668, 31437712), (1336, 15718856), (2672, 7859428), (5344, 3929714), (10688, 1964857)]