19899715

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{15731}}^1$

素因数の和:15770

約数の個数: 16

約数和(自身を含む): 27184896

約数和(自身を除く): 7285181

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 15731, 78655, 173041, 361813, 865205, 1809065, 3979943, 19899715]

約数ペア:

[(1, 19899715), (5, 3979943), (11, 1809065), (23, 865205), (55, 361813), (115, 173041), (253, 78655), (1265, 15731)]