20738816

素因数分解:

$2^8\times 7^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 48271104

約数和(自身を除く): 27532288

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 71, 112, 128, 142, 163, 224, 256, 284, 326, 448, 497, 568, 652, 896, 994, 1136, 1141, 1304, 1792, 1988, 2272, 2282, 2608, 3976, 4544, 4564, 5216, 7952, 9088, 9128, 10432, 11573, 15904, 18176, 18256, 20864, 23146, 31808, 36512, 41728, 46292, 63616, 73024, 81011, 92584, 127232, 146048, 162022, 185168, 292096, 324044, 370336, 648088, 740672, 1296176, 1481344, 2592352, 2962688, 5184704, 10369408, 20738816]

約数ペア:

[(1, 20738816), (2, 10369408), (4, 5184704), (7, 2962688), (8, 2592352), (14, 1481344), (16, 1296176), (28, 740672), (32, 648088), (56, 370336), (64, 324044), (71, 292096), (112, 185168), (128, 162022), (142, 146048), (163, 127232), (224, 92584), (256, 81011), (284, 73024), (326, 63616), (448, 46292), (497, 41728), (568, 36512), (652, 31808), (896, 23146), (994, 20864), (1136, 18256), (1141, 18176), (1304, 15904), (1792, 11573), (1988, 10432), (2272, 9128), (2282, 9088), (2608, 7952), (3976, 5216), (4544, 4564)]