20809408

素因数分解:

$2^6\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:297

約数の個数: 56

約数和(自身を含む): 44145200

約数和(自身を除く): 23335792

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 64, 76, 109, 152, 157, 218, 304, 314, 436, 608, 628, 872, 1216, 1256, 1744, 2071, 2512, 2983, 3488, 4142, 5024, 5966, 6976, 8284, 10048, 11932, 16568, 17113, 23864, 33136, 34226, 47728, 66272, 68452, 95456, 132544, 136904, 190912, 273808, 325147, 547616, 650294, 1095232, 1300588, 2601176, 5202352, 10404704, 20809408]

約数ペア:

[(1, 20809408), (2, 10404704), (4, 5202352), (8, 2601176), (16, 1300588), (19, 1095232), (32, 650294), (38, 547616), (64, 325147), (76, 273808), (109, 190912), (152, 136904), (157, 132544), (218, 95456), (304, 68452), (314, 66272), (436, 47728), (608, 34226), (628, 33136), (872, 23864), (1216, 17113), (1256, 16568), (1744, 11932), (2071, 10048), (2512, 8284), (2983, 6976), (3488, 5966), (4142, 5024)]