40001991

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{19991}}^1$

素因数の和:20046

約数の個数: 16

約数和(自身を含む): 57576960

約数和(自身を除く): 17574969

約数列:

[1, 3, 23, 29, 69, 87, 667, 2001, 19991, 59973, 459793, 579739, 1379379, 1739217, 13333997, 40001991]

約数ペア:

[(1, 40001991), (3, 13333997), (23, 1739217), (29, 1379379), (69, 579739), (87, 459793), (667, 59973), (2001, 19991)]