21320656

素因数分解:

$2^4\times 7^1\times {\mathrm{41}}^1\times {\mathrm{4643}}^1$

素因数の和:4699

約数の個数: 40

約数和(自身を含む): 48371904

約数和(自身を除く): 27051248

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 41, 56, 82, 112, 164, 287, 328, 574, 656, 1148, 2296, 4592, 4643, 9286, 18572, 32501, 37144, 65002, 74288, 130004, 190363, 260008, 380726, 520016, 761452, 1332541, 1522904, 2665082, 3045808, 5330164, 10660328, 21320656]

約数ペア:

[(1, 21320656), (2, 10660328), (4, 5330164), (7, 3045808), (8, 2665082), (14, 1522904), (16, 1332541), (28, 761452), (41, 520016), (56, 380726), (82, 260008), (112, 190363), (164, 130004), (287, 74288), (328, 65002), (574, 37144), (656, 32501), (1148, 18572), (2296, 9286), (4592, 4643)]