21391864

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{1997}}^1$

素因数の和:2119

約数の個数: 32

約数和(自身を含む): 43636320

約数和(自身を除く): 22244456

約数列:

[1, 2, 4, 8, 13, 26, 52, 103, 104, 206, 412, 824, 1339, 1997, 2678, 3994, 5356, 7988, 10712, 15976, 25961, 51922, 103844, 205691, 207688, 411382, 822764, 1645528, 2673983, 5347966, 10695932, 21391864]

約数ペア:

[(1, 21391864), (2, 10695932), (4, 5347966), (8, 2673983), (13, 1645528), (26, 822764), (52, 411382), (103, 207688), (104, 205691), (206, 103844), (412, 51922), (824, 25961), (1339, 15976), (1997, 10712), (2678, 7988), (3994, 5356)]