20161988

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^3\times {\mathrm{541}}^1$

素因数の和:585

約数の個数: 48

約数和(自身を含む): 44435328

約数和(自身を除く): 24273340

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 121, 154, 242, 308, 484, 541, 847, 1082, 1331, 1694, 2164, 2662, 3388, 3787, 5324, 5951, 7574, 9317, 11902, 15148, 18634, 23804, 37268, 41657, 65461, 83314, 130922, 166628, 261844, 458227, 720071, 916454, 1440142, 1832908, 2880284, 5040497, 10080994, 20161988]

約数ペア:

[(1, 20161988), (2, 10080994), (4, 5040497), (7, 2880284), (11, 1832908), (14, 1440142), (22, 916454), (28, 720071), (44, 458227), (77, 261844), (121, 166628), (154, 130922), (242, 83314), (308, 65461), (484, 41657), (541, 37268), (847, 23804), (1082, 18634), (1331, 15148), (1694, 11902), (2164, 9317), (2662, 7574), (3388, 5951), (3787, 5324)]