21731680

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1913}}^1$

素因数の和:1999

約数の個数: 48

約数和(自身を含む): 52091424

約数和(自身を除く): 30359744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1913, 2272, 2840, 3826, 5680, 7652, 9565, 11360, 15304, 19130, 30608, 38260, 61216, 76520, 135823, 153040, 271646, 306080, 543292, 679115, 1086584, 1358230, 2173168, 2716460, 4346336, 5432920, 10865840, 21731680]

約数ペア:

[(1, 21731680), (2, 10865840), (4, 5432920), (5, 4346336), (8, 2716460), (10, 2173168), (16, 1358230), (20, 1086584), (32, 679115), (40, 543292), (71, 306080), (80, 271646), (142, 153040), (160, 135823), (284, 76520), (355, 61216), (568, 38260), (710, 30608), (1136, 19130), (1420, 15304), (1913, 11360), (2272, 9565), (2840, 7652), (3826, 5680)]