20157855

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{449}}^1$

素因数の和:571

約数の個数: 32

約数和(自身を含む): 33566400

約数和(自身を除く): 13408545

約数列:

[1, 3, 5, 15, 41, 73, 123, 205, 219, 365, 449, 615, 1095, 1347, 2245, 2993, 6735, 8979, 14965, 18409, 32777, 44895, 55227, 92045, 98331, 163885, 276135, 491655, 1343857, 4031571, 6719285, 20157855]

約数ペア:

[(1, 20157855), (3, 6719285), (5, 4031571), (15, 1343857), (41, 491655), (73, 276135), (123, 163885), (205, 98331), (219, 92045), (365, 55227), (449, 44895), (615, 32777), (1095, 18409), (1347, 14965), (2245, 8979), (2993, 6735)]