21005296

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{100987}}^1$

素因数の和:101008

約数の個数: 20

約数和(自身を含む): 43828792

約数和(自身を除く): 22823496

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 100987, 201974, 403948, 807896, 1312831, 1615792, 2625662, 5251324, 10502648, 21005296]

約数ペア:

[(1, 21005296), (2, 10502648), (4, 5251324), (8, 2625662), (13, 1615792), (16, 1312831), (26, 807896), (52, 403948), (104, 201974), (208, 100987)]