20215520

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9719}}^1$

素因数の和:9747

約数の個数: 48

約数和(自身を含む): 51438240

約数和(自身を除く): 31222720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9719, 19438, 38876, 48595, 77752, 97190, 126347, 155504, 194380, 252694, 311008, 388760, 505388, 631735, 777520, 1010776, 1263470, 1555040, 2021552, 2526940, 4043104, 5053880, 10107760, 20215520]

約数ペア:

[(1, 20215520), (2, 10107760), (4, 5053880), (5, 4043104), (8, 2526940), (10, 2021552), (13, 1555040), (16, 1263470), (20, 1010776), (26, 777520), (32, 631735), (40, 505388), (52, 388760), (65, 311008), (80, 252694), (104, 194380), (130, 155504), (160, 126347), (208, 97190), (260, 77752), (416, 48595), (520, 38876), (1040, 19438), (2080, 9719)]