21439288

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{977}}^1$

素因数の和:1207

約数の個数: 32

約数和(自身を含む): 43540560

約数和(自身を除く): 22101272

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 211, 422, 844, 977, 1688, 1954, 2743, 3908, 5486, 7816, 10972, 12701, 21944, 25402, 50804, 101608, 206147, 412294, 824588, 1649176, 2679911, 5359822, 10719644, 21439288]

約数ペア:

[(1, 21439288), (2, 10719644), (4, 5359822), (8, 2679911), (13, 1649176), (26, 824588), (52, 412294), (104, 206147), (211, 101608), (422, 50804), (844, 25402), (977, 21944), (1688, 12701), (1954, 10972), (2743, 7816), (3908, 5486)]