19981502

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{1249}}^1$

素因数の和:1691

約数の個数: 16

約数和(自身を含む): 31650000

約数和(自身を除く): 11668498

約数列:

[1, 2, 19, 38, 421, 842, 1249, 2498, 7999, 15998, 23731, 47462, 525829, 1051658, 9990751, 19981502]

約数ペア:

[(1, 19981502), (2, 9990751), (19, 1051658), (38, 525829), (421, 47462), (842, 23731), (1249, 15998), (2498, 7999)]