21402920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6949}}^1$

素因数の和:6978

約数の個数: 64

約数和(自身を含む): 60048000

約数和(自身を除く): 38645080

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 220, 280, 308, 385, 440, 616, 770, 1540, 3080, 6949, 13898, 27796, 34745, 48643, 55592, 69490, 76439, 97286, 138980, 152878, 194572, 243215, 277960, 305756, 382195, 389144, 486430, 535073, 611512, 764390, 972860, 1070146, 1528780, 1945720, 2140292, 2675365, 3057560, 4280584, 5350730, 10701460, 21402920]

約数ペア:

[(1, 21402920), (2, 10701460), (4, 5350730), (5, 4280584), (7, 3057560), (8, 2675365), (10, 2140292), (11, 1945720), (14, 1528780), (20, 1070146), (22, 972860), (28, 764390), (35, 611512), (40, 535073), (44, 486430), (55, 389144), (56, 382195), (70, 305756), (77, 277960), (88, 243215), (110, 194572), (140, 152878), (154, 138980), (220, 97286), (280, 76439), (308, 69490), (385, 55592), (440, 48643), (616, 34745), (770, 27796), (1540, 13898), (3080, 6949)]