20347904

素因数分解:

$2^{10}\times {\mathrm{31}}^1\times {\mathrm{641}}^1$

素因数の和:692

約数の個数: 44

約数和(自身を含む): 42053568

約数和(自身を除く): 21705664

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 496, 512, 641, 992, 1024, 1282, 1984, 2564, 3968, 5128, 7936, 10256, 15872, 19871, 20512, 31744, 39742, 41024, 79484, 82048, 158968, 164096, 317936, 328192, 635872, 656384, 1271744, 2543488, 5086976, 10173952, 20347904]

約数ペア:

[(1, 20347904), (2, 10173952), (4, 5086976), (8, 2543488), (16, 1271744), (31, 656384), (32, 635872), (62, 328192), (64, 317936), (124, 164096), (128, 158968), (248, 82048), (256, 79484), (496, 41024), (512, 39742), (641, 31744), (992, 20512), (1024, 19871), (1282, 15872), (1984, 10256), (2564, 7936), (3968, 5128)]