20818168

素因数分解:

$2^3\times 7^1\times {\mathrm{89}}^1\times {\mathrm{4177}}^1$

素因数の和:4279

約数の個数: 32

約数和(自身を含む): 45122400

約数和(自身を除く): 24304232

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 89, 178, 356, 623, 712, 1246, 2492, 4177, 4984, 8354, 16708, 29239, 33416, 58478, 116956, 233912, 371753, 743506, 1487012, 2602271, 2974024, 5204542, 10409084, 20818168]

約数ペア:

[(1, 20818168), (2, 10409084), (4, 5204542), (7, 2974024), (8, 2602271), (14, 1487012), (28, 743506), (56, 371753), (89, 233912), (178, 116956), (356, 58478), (623, 33416), (712, 29239), (1246, 16708), (2492, 8354), (4177, 4984)]