20871590

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71971}}^1$

素因数の和:72007

約数の個数: 16

約数和(自身を含む): 38864880

約数和(自身を除く): 17993290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 71971, 143942, 359855, 719710, 2087159, 4174318, 10435795, 20871590]

約数ペア:

[(1, 20871590), (2, 10435795), (5, 4174318), (10, 2087159), (29, 719710), (58, 359855), (145, 143942), (290, 71971)]