21309220

素因数分解:

$2^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{4421}}^1$

素因数の和:4671

約数の個数: 24

約数和(自身を含む): 44945208

約数和(自身を除く): 23635988

約数列:

[1, 2, 4, 5, 10, 20, 241, 482, 964, 1205, 2410, 4421, 4820, 8842, 17684, 22105, 44210, 88420, 1065461, 2130922, 4261844, 5327305, 10654610, 21309220]

約数ペア:

[(1, 21309220), (2, 10654610), (4, 5327305), (5, 4261844), (10, 2130922), (20, 1065461), (241, 88420), (482, 44210), (964, 22105), (1205, 17684), (2410, 8842), (4421, 4820)]