21720746

素因数分解:

$2^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{1013}}^1$

素因数の和:1237

約数の個数: 16

約数和(自身を含む): 33291648

約数和(自身を除く): 11570902

約数列:

[1, 2, 71, 142, 151, 302, 1013, 2026, 10721, 21442, 71923, 143846, 152963, 305926, 10860373, 21720746]

約数ペア:

[(1, 21720746), (2, 10860373), (71, 305926), (142, 152963), (151, 143846), (302, 71923), (1013, 21442), (2026, 10721)]