21221072

素因数分解:

$2^4\times {\mathrm{331}}^1\times {\mathrm{4007}}^1$

素因数の和:4346

約数の個数: 20

約数和(自身を含む): 41250336

約数和(自身を除く): 20029264

約数列:

[1, 2, 4, 8, 16, 331, 662, 1324, 2648, 4007, 5296, 8014, 16028, 32056, 64112, 1326317, 2652634, 5305268, 10610536, 21221072]

約数ペア:

[(1, 21221072), (2, 10610536), (4, 5305268), (8, 2652634), (16, 1326317), (331, 64112), (662, 32056), (1324, 16028), (2648, 8014), (4007, 5296)]