21041840

素因数分解:

$2^4\times 5^1\times {\mathrm{263023}}^1$

素因数の和:263036

約数の個数: 20

約数和(自身を含む): 48922464

約数和(自身を除く): 27880624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263023, 526046, 1052092, 1315115, 2104184, 2630230, 4208368, 5260460, 10520920, 21041840]

約数ペア:

[(1, 21041840), (2, 10520920), (4, 5260460), (5, 4208368), (8, 2630230), (10, 2104184), (16, 1315115), (20, 1052092), (40, 526046), (80, 263023)]