20681216

素因数分解:

$2^9\times {\mathrm{31}}^1\times {\mathrm{1303}}^1$

素因数の和:1352

約数の個数: 40

約数和(自身を含む): 42687744

約数和(自身を除く): 22006528

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 496, 512, 992, 1303, 1984, 2606, 3968, 5212, 7936, 10424, 15872, 20848, 40393, 41696, 80786, 83392, 161572, 166784, 323144, 333568, 646288, 667136, 1292576, 2585152, 5170304, 10340608, 20681216]

約数ペア:

[(1, 20681216), (2, 10340608), (4, 5170304), (8, 2585152), (16, 1292576), (31, 667136), (32, 646288), (62, 333568), (64, 323144), (124, 166784), (128, 161572), (248, 83392), (256, 80786), (496, 41696), (512, 40393), (992, 20848), (1303, 15872), (1984, 10424), (2606, 7936), (3968, 5212)]