21552280

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{2003}}^1$

素因数の和:2283

約数の個数: 32

約数和(自身を含む): 48697200

約数和(自身を除く): 27144920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 538, 1076, 1345, 2003, 2152, 2690, 4006, 5380, 8012, 10015, 10760, 16024, 20030, 40060, 80120, 538807, 1077614, 2155228, 2694035, 4310456, 5388070, 10776140, 21552280]

約数ペア:

[(1, 21552280), (2, 10776140), (4, 5388070), (5, 4310456), (8, 2694035), (10, 2155228), (20, 1077614), (40, 538807), (269, 80120), (538, 40060), (1076, 20030), (1345, 16024), (2003, 10760), (2152, 10015), (2690, 8012), (4006, 5380)]