21571784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{6691}}^1$

素因数の和:6741

約数の個数: 32

約数和(自身を含む): 44970240

約数和(自身を除く): 23398456

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 104, 124, 248, 403, 806, 1612, 3224, 6691, 13382, 26764, 53528, 86983, 173966, 207421, 347932, 414842, 695864, 829684, 1659368, 2696473, 5392946, 10785892, 21571784]

約数ペア:

[(1, 21571784), (2, 10785892), (4, 5392946), (8, 2696473), (13, 1659368), (26, 829684), (31, 695864), (52, 414842), (62, 347932), (104, 207421), (124, 173966), (248, 86983), (403, 53528), (806, 26764), (1612, 13382), (3224, 6691)]