18243440

素因数分解:

$2^4\times 5^1\times {\mathrm{457}}^1\times {\mathrm{499}}^1$

素因数の和:969

約数の個数: 40

約数和(自身を含む): 42594000

約数和(自身を除く): 24350560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 457, 499, 914, 998, 1828, 1996, 2285, 2495, 3656, 3992, 4570, 4990, 7312, 7984, 9140, 9980, 18280, 19960, 36560, 39920, 228043, 456086, 912172, 1140215, 1824344, 2280430, 3648688, 4560860, 9121720, 18243440]

約数ペア:

[(1, 18243440), (2, 9121720), (4, 4560860), (5, 3648688), (8, 2280430), (10, 1824344), (16, 1140215), (20, 912172), (40, 456086), (80, 228043), (457, 39920), (499, 36560), (914, 19960), (998, 18280), (1828, 9980), (1996, 9140), (2285, 7984), (2495, 7312), (3656, 4990), (3992, 4570)]