19907998

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{661}}^1$

素因数の和:748

約数の個数: 24

約数和(自身を含む): 33531624

約数和(自身を除く): 13623626

約数列:

[1, 2, 11, 22, 37, 74, 407, 661, 814, 1322, 1369, 2738, 7271, 14542, 15059, 24457, 30118, 48914, 269027, 538054, 904909, 1809818, 9953999, 19907998]

約数ペア:

[(1, 19907998), (2, 9953999), (11, 1809818), (22, 904909), (37, 538054), (74, 269027), (407, 48914), (661, 30118), (814, 24457), (1322, 15059), (1369, 14542), (2738, 7271)]