20688416

素因数分解:

$2^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4861}}^1$

素因数の和:4897

約数の個数: 48

約数和(自身を含む): 49008960

約数和(自身を除く): 28320544

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 32, 38, 56, 76, 112, 133, 152, 224, 266, 304, 532, 608, 1064, 2128, 4256, 4861, 9722, 19444, 34027, 38888, 68054, 77776, 92359, 136108, 155552, 184718, 272216, 369436, 544432, 646513, 738872, 1088864, 1293026, 1477744, 2586052, 2955488, 5172104, 10344208, 20688416]

約数ペア:

[(1, 20688416), (2, 10344208), (4, 5172104), (7, 2955488), (8, 2586052), (14, 1477744), (16, 1293026), (19, 1088864), (28, 738872), (32, 646513), (38, 544432), (56, 369436), (76, 272216), (112, 184718), (133, 155552), (152, 136108), (224, 92359), (266, 77776), (304, 68054), (532, 38888), (608, 34027), (1064, 19444), (2128, 9722), (4256, 4861)]