19907995

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{331}}^1\times {\mathrm{523}}^1$

素因数の和:882

約数の個数: 16

約数和(自身を含む): 25051392

約数和(自身を除く): 5143397

約数列:

[1, 5, 23, 115, 331, 523, 1655, 2615, 7613, 12029, 38065, 60145, 173113, 865565, 3981599, 19907995]

約数ペア:

[(1, 19907995), (5, 3981599), (23, 865565), (115, 173113), (331, 60145), (523, 38065), (1655, 12029), (2615, 7613)]