20050720

素因数分解:

$2^5\times 5^1\times {\mathrm{113}}^1\times {\mathrm{1109}}^1$

素因数の和:1237

約数の個数: 48

約数和(自身を含む): 47832120

約数和(自身を除く): 27781400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 113, 160, 226, 452, 565, 904, 1109, 1130, 1808, 2218, 2260, 3616, 4436, 4520, 5545, 8872, 9040, 11090, 17744, 18080, 22180, 35488, 44360, 88720, 125317, 177440, 250634, 501268, 626585, 1002536, 1253170, 2005072, 2506340, 4010144, 5012680, 10025360, 20050720]

約数ペア:

[(1, 20050720), (2, 10025360), (4, 5012680), (5, 4010144), (8, 2506340), (10, 2005072), (16, 1253170), (20, 1002536), (32, 626585), (40, 501268), (80, 250634), (113, 177440), (160, 125317), (226, 88720), (452, 44360), (565, 35488), (904, 22180), (1109, 18080), (1130, 17744), (1808, 11090), (2218, 9040), (2260, 8872), (3616, 5545), (4436, 4520)]