20740880

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2423}}^1$

素因数の和:2543

約数の個数: 40

約数和(自身を含む): 48693312

約数和(自身を除く): 27952432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2423, 4280, 4846, 8560, 9692, 12115, 19384, 24230, 38768, 48460, 96920, 193840, 259261, 518522, 1037044, 1296305, 2074088, 2592610, 4148176, 5185220, 10370440, 20740880]

約数ペア:

[(1, 20740880), (2, 10370440), (4, 5185220), (5, 4148176), (8, 2592610), (10, 2074088), (16, 1296305), (20, 1037044), (40, 518522), (80, 259261), (107, 193840), (214, 96920), (428, 48460), (535, 38768), (856, 24230), (1070, 19384), (1712, 12115), (2140, 9692), (2423, 8560), (4280, 4846)]