21495880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76771}}^1$

素因数の和:76789

約数の個数: 32

約数和(自身を含む): 55275840

約数和(自身を除く): 33779960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76771, 153542, 307084, 383855, 537397, 614168, 767710, 1074794, 1535420, 2149588, 2686985, 3070840, 4299176, 5373970, 10747940, 21495880]

約数ペア:

[(1, 21495880), (2, 10747940), (4, 5373970), (5, 4299176), (7, 3070840), (8, 2686985), (10, 2149588), (14, 1535420), (20, 1074794), (28, 767710), (35, 614168), (40, 537397), (56, 383855), (70, 307084), (140, 153542), (280, 76771)]