20721488

素因数分解:

$2^4\times {\mathrm{73}}^1\times {\mathrm{113}}^1\times {\mathrm{157}}^1$

素因数の和:351

約数の個数: 40

約数和(自身を含む): 41319528

約数和(自身を除く): 20598040

約数列:

[1, 2, 4, 8, 16, 73, 113, 146, 157, 226, 292, 314, 452, 584, 628, 904, 1168, 1256, 1808, 2512, 8249, 11461, 16498, 17741, 22922, 32996, 35482, 45844, 65992, 70964, 91688, 131984, 141928, 183376, 283856, 1295093, 2590186, 5180372, 10360744, 20721488]

約数ペア:

[(1, 20721488), (2, 10360744), (4, 5180372), (8, 2590186), (16, 1295093), (73, 283856), (113, 183376), (146, 141928), (157, 131984), (226, 91688), (292, 70964), (314, 65992), (452, 45844), (584, 35482), (628, 32996), (904, 22922), (1168, 17741), (1256, 16498), (1808, 11461), (2512, 8249)]