20994260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5171}}^1$

素因数の和:5216

約数の個数: 48

約数和(自身を含む): 52133760

約数和(自身を除く): 31139500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5171, 10342, 20684, 25855, 36197, 51710, 72394, 103420, 144788, 149959, 180985, 299918, 361970, 599836, 723940, 749795, 1049713, 1499590, 2099426, 2999180, 4198852, 5248565, 10497130, 20994260]

約数ペア:

[(1, 20994260), (2, 10497130), (4, 5248565), (5, 4198852), (7, 2999180), (10, 2099426), (14, 1499590), (20, 1049713), (28, 749795), (29, 723940), (35, 599836), (58, 361970), (70, 299918), (116, 180985), (140, 149959), (145, 144788), (203, 103420), (290, 72394), (406, 51710), (580, 36197), (812, 25855), (1015, 20684), (2030, 10342), (4060, 5171)]