21003560

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7193}}^1$

素因数の和:7277

約数の個数: 32

約数和(自身を含む): 47912040

約数和(自身を除く): 26908480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7193, 14386, 28772, 35965, 57544, 71930, 143860, 287720, 525089, 1050178, 2100356, 2625445, 4200712, 5250890, 10501780, 21003560]

約数ペア:

[(1, 21003560), (2, 10501780), (4, 5250890), (5, 4200712), (8, 2625445), (10, 2100356), (20, 1050178), (40, 525089), (73, 287720), (146, 143860), (292, 71930), (365, 57544), (584, 35965), (730, 28772), (1460, 14386), (2920, 7193)]