21253648

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102181}}^1$

素因数の和:102202

約数の個数: 20

約数和(自身を含む): 44346988

約数和(自身を除く): 23093340

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102181, 204362, 408724, 817448, 1328353, 1634896, 2656706, 5313412, 10626824, 21253648]

約数ペア:

[(1, 21253648), (2, 10626824), (4, 5313412), (8, 2656706), (13, 1634896), (16, 1328353), (26, 817448), (52, 408724), (104, 204362), (208, 102181)]