20889784

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{643}}^1$

素因数の和:811

約数の個数: 32

約数和(自身を含む): 40803840

約数和(自身を除く): 19914056

約数列:

[1, 2, 4, 8, 31, 62, 124, 131, 248, 262, 524, 643, 1048, 1286, 2572, 4061, 5144, 8122, 16244, 19933, 32488, 39866, 79732, 84233, 159464, 168466, 336932, 673864, 2611223, 5222446, 10444892, 20889784]

約数ペア:

[(1, 20889784), (2, 10444892), (4, 5222446), (8, 2611223), (31, 673864), (62, 336932), (124, 168466), (131, 159464), (248, 84233), (262, 79732), (524, 39866), (643, 32488), (1048, 19933), (1286, 16244), (2572, 8122), (4061, 5144)]