20780505

素因数分解:

$3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{8713}}^1$

素因数の和:8777

約数の個数: 24

約数和(自身を含む): 36703368

約数和(自身を除く): 15922863

約数列:

[1, 3, 5, 9, 15, 45, 53, 159, 265, 477, 795, 2385, 8713, 26139, 43565, 78417, 130695, 392085, 461789, 1385367, 2308945, 4156101, 6926835, 20780505]

約数ペア:

[(1, 20780505), (3, 6926835), (5, 4156101), (9, 2308945), (15, 1385367), (45, 461789), (53, 392085), (159, 130695), (265, 78417), (477, 43565), (795, 26139), (2385, 8713)]