21369255

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1783}}^1$

素因数の和:1855

約数の個数: 32

約数和(自身を含む): 36993024

約数和(自身を除く): 15623769

約数列:

[1, 3, 5, 15, 17, 47, 51, 85, 141, 235, 255, 705, 799, 1783, 2397, 3995, 5349, 8915, 11985, 26745, 30311, 83801, 90933, 151555, 251403, 419005, 454665, 1257015, 1424617, 4273851, 7123085, 21369255]

約数ペア:

[(1, 21369255), (3, 7123085), (5, 4273851), (15, 1424617), (17, 1257015), (47, 454665), (51, 419005), (85, 251403), (141, 151555), (235, 90933), (255, 83801), (705, 30311), (799, 26745), (1783, 11985), (2397, 8915), (3995, 5349)]