20745920

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4987}}^1$

素因数の和:5017

約数の個数: 56

約数和(自身を含む): 53211984

約数和(自身を除く): 32466064

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 4987, 9974, 19948, 24935, 39896, 49870, 64831, 79792, 99740, 129662, 159584, 199480, 259324, 319168, 324155, 398960, 518648, 648310, 797920, 1037296, 1296620, 1595840, 2074592, 2593240, 4149184, 5186480, 10372960, 20745920]

約数ペア:

[(1, 20745920), (2, 10372960), (4, 5186480), (5, 4149184), (8, 2593240), (10, 2074592), (13, 1595840), (16, 1296620), (20, 1037296), (26, 797920), (32, 648310), (40, 518648), (52, 398960), (64, 324155), (65, 319168), (80, 259324), (104, 199480), (130, 159584), (160, 129662), (208, 99740), (260, 79792), (320, 64831), (416, 49870), (520, 39896), (832, 24935), (1040, 19948), (2080, 9974), (4160, 4987)]