20687220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{409}}^1$

素因数の和:705

約数の個数: 72

約数和(自身を含む): 63128520

約数和(自身を除く): 42441300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 281, 409, 562, 818, 843, 1124, 1227, 1405, 1636, 1686, 2045, 2454, 2529, 2810, 3372, 3681, 4090, 4215, 4908, 5058, 5620, 6135, 7362, 8180, 8430, 10116, 12270, 12645, 14724, 16860, 18405, 24540, 25290, 36810, 50580, 73620, 114929, 229858, 344787, 459716, 574645, 689574, 1034361, 1149290, 1379148, 1723935, 2068722, 2298580, 3447870, 4137444, 5171805, 6895740, 10343610, 20687220]

約数ペア:

[(1, 20687220), (2, 10343610), (3, 6895740), (4, 5171805), (5, 4137444), (6, 3447870), (9, 2298580), (10, 2068722), (12, 1723935), (15, 1379148), (18, 1149290), (20, 1034361), (30, 689574), (36, 574645), (45, 459716), (60, 344787), (90, 229858), (180, 114929), (281, 73620), (409, 50580), (562, 36810), (818, 25290), (843, 24540), (1124, 18405), (1227, 16860), (1405, 14724), (1636, 12645), (1686, 12270), (2045, 10116), (2454, 8430), (2529, 8180), (2810, 7362), (3372, 6135), (3681, 5620), (4090, 5058), (4215, 4908)]