21399248

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102881}}^1$

素因数の和:102902

約数の個数: 20

約数和(自身を含む): 44650788

約数和(自身を除く): 23251540

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102881, 205762, 411524, 823048, 1337453, 1646096, 2674906, 5349812, 10699624, 21399248]

約数ペア:

[(1, 21399248), (2, 10699624), (4, 5349812), (8, 2674906), (13, 1646096), (16, 1337453), (26, 823048), (52, 411524), (104, 205762), (208, 102881)]