20875760

素因数分解:

$2^4\times 5^1\times {\mathrm{457}}^1\times {\mathrm{571}}^1$

素因数の和:1041

約数の個数: 40

約数和(自身を含む): 48727536

約数和(自身を除く): 27851776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 457, 571, 914, 1142, 1828, 2284, 2285, 2855, 3656, 4568, 4570, 5710, 7312, 9136, 9140, 11420, 18280, 22840, 36560, 45680, 260947, 521894, 1043788, 1304735, 2087576, 2609470, 4175152, 5218940, 10437880, 20875760]

約数ペア:

[(1, 20875760), (2, 10437880), (4, 5218940), (5, 4175152), (8, 2609470), (10, 2087576), (16, 1304735), (20, 1043788), (40, 521894), (80, 260947), (457, 45680), (571, 36560), (914, 22840), (1142, 18280), (1828, 11420), (2284, 9140), (2285, 9136), (2855, 7312), (3656, 5710), (4568, 4570)]