257667020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{991027}}^1$

素因数の和:991049

約数の個数: 24

約数和(自身を含む): 582724464

約数和(自身を除く): 325057444

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 991027, 1982054, 3964108, 4955135, 9910270, 12883351, 19820540, 25766702, 51533404, 64416755, 128833510, 257667020]

約数ペア:

[(1, 257667020), (2, 128833510), (4, 64416755), (5, 51533404), (10, 25766702), (13, 19820540), (20, 12883351), (26, 9910270), (52, 4955135), (65, 3964108), (130, 1982054), (260, 991027)]