21275362

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1\times {\mathrm{839}}^1$

素因数の和:1281

約数の個数: 16

約数和(自身を含む): 33062400

約数和(自身を除く): 11787038

約数列:

[1, 2, 31, 62, 409, 818, 839, 1678, 12679, 25358, 26009, 52018, 343151, 686302, 10637681, 21275362]

約数ペア:

[(1, 21275362), (2, 10637681), (31, 686302), (62, 343151), (409, 52018), (818, 26009), (839, 25358), (1678, 12679)]