21770905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{1091}}^1$

素因数の和:1416

約数の個数: 16

約数和(自身を含む): 28252224

約数和(自身を除く): 6481319

約数列:

[1, 5, 13, 65, 307, 1091, 1535, 3991, 5455, 14183, 19955, 70915, 334937, 1674685, 4354181, 21770905]

約数ペア:

[(1, 21770905), (5, 4354181), (13, 1674685), (65, 334937), (307, 70915), (1091, 19955), (1535, 14183), (3991, 5455)]