19987807

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{229}}^1\times {\mathrm{337}}^1$

素因数の和:610

約数の個数: 16

約数和(自身を含む): 23632960

約数和(自身を除く): 3645153

約数列:

[1, 7, 37, 229, 259, 337, 1603, 2359, 8473, 12469, 59311, 77173, 87283, 540211, 2855401, 19987807]

約数ペア:

[(1, 19987807), (7, 2855401), (37, 540211), (229, 87283), (259, 77173), (337, 59311), (1603, 12469), (2359, 8473)]