20916688

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{443}}^1$

素因数の和:691

約数の個数: 40

約数和(自身を含む): 43934688

約数和(自身を除く): 23018000

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 227, 443, 454, 886, 908, 1772, 1816, 2951, 3544, 3632, 5759, 5902, 7088, 11518, 11804, 23036, 23608, 46072, 47216, 92144, 100561, 201122, 402244, 804488, 1307293, 1608976, 2614586, 5229172, 10458344, 20916688]

約数ペア:

[(1, 20916688), (2, 10458344), (4, 5229172), (8, 2614586), (13, 1608976), (16, 1307293), (26, 804488), (52, 402244), (104, 201122), (208, 100561), (227, 92144), (443, 47216), (454, 46072), (886, 23608), (908, 23036), (1772, 11804), (1816, 11518), (2951, 7088), (3544, 5902), (3632, 5759)]