21095120

素因数分解:

$2^4\times 5^1\times {\mathrm{457}}^1\times {\mathrm{577}}^1$

素因数の和:1047

約数の個数: 40

約数和(自身を含む): 49238664

約数和(自身を除く): 28143544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 457, 577, 914, 1154, 1828, 2285, 2308, 2885, 3656, 4570, 4616, 5770, 7312, 9140, 9232, 11540, 18280, 23080, 36560, 46160, 263689, 527378, 1054756, 1318445, 2109512, 2636890, 4219024, 5273780, 10547560, 21095120]

約数ペア:

[(1, 21095120), (2, 10547560), (4, 5273780), (5, 4219024), (8, 2636890), (10, 2109512), (16, 1318445), (20, 1054756), (40, 527378), (80, 263689), (457, 46160), (577, 36560), (914, 23080), (1154, 18280), (1828, 11540), (2285, 9232), (2308, 9140), (2885, 7312), (3656, 5770), (4570, 4616)]