20640195

素因数分解:

$3^2\times 5^1\times {\mathrm{523}}^1\times {\mathrm{877}}^1$

素因数の和:1411

約数の個数: 24

約数和(自身を含む): 35885616

約数和(自身を除く): 15245421

約数列:

[1, 3, 5, 9, 15, 45, 523, 877, 1569, 2615, 2631, 4385, 4707, 7845, 7893, 13155, 23535, 39465, 458671, 1376013, 2293355, 4128039, 6880065, 20640195]

約数ペア:

[(1, 20640195), (3, 6880065), (5, 4128039), (9, 2293355), (15, 1376013), (45, 458671), (523, 39465), (877, 23535), (1569, 13155), (2615, 7893), (2631, 7845), (4385, 4707)]