21071560

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{2003}}^1$

素因数の和:2277

約数の個数: 32

約数和(自身を含む): 47615040

約数和(自身を除く): 26543480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 2003, 2104, 2630, 4006, 5260, 8012, 10015, 10520, 16024, 20030, 40060, 80120, 526789, 1053578, 2107156, 2633945, 4214312, 5267890, 10535780, 21071560]

約数ペア:

[(1, 21071560), (2, 10535780), (4, 5267890), (5, 4214312), (8, 2633945), (10, 2107156), (20, 1053578), (40, 526789), (263, 80120), (526, 40060), (1052, 20030), (1315, 16024), (2003, 10520), (2104, 10015), (2630, 8012), (4006, 5260)]