20465744

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1613}}^1$

素因数の和:1695

約数の個数: 40

約数和(自身を含む): 43429512

約数和(自身を除く): 22963768

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 61, 104, 122, 208, 244, 488, 793, 976, 1586, 1613, 3172, 3226, 6344, 6452, 12688, 12904, 20969, 25808, 41938, 83876, 98393, 167752, 196786, 335504, 393572, 787144, 1279109, 1574288, 2558218, 5116436, 10232872, 20465744]

約数ペア:

[(1, 20465744), (2, 10232872), (4, 5116436), (8, 2558218), (13, 1574288), (16, 1279109), (26, 787144), (52, 393572), (61, 335504), (104, 196786), (122, 167752), (208, 98393), (244, 83876), (488, 41938), (793, 25808), (976, 20969), (1586, 12904), (1613, 12688), (3172, 6452), (3226, 6344)]