21540688

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103561}}^1$

素因数の和:103582

約数の個数: 20

約数和(自身を含む): 44945908

約数和(自身を除く): 23405220

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103561, 207122, 414244, 828488, 1346293, 1656976, 2692586, 5385172, 10770344, 21540688]

約数ペア:

[(1, 21540688), (2, 10770344), (4, 5385172), (8, 2692586), (13, 1656976), (16, 1346293), (26, 828488), (52, 414244), (104, 207122), (208, 103561)]