21689185

素因数分解:

$5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{4159}}^1$

素因数の和:4320

約数の個数: 16

約数和(自身を含む): 29952000

約数和(自身を除く): 8262815

約数列:

[1, 5, 7, 35, 149, 745, 1043, 4159, 5215, 20795, 29113, 145565, 619691, 3098455, 4337837, 21689185]

約数ペア:

[(1, 21689185), (5, 4337837), (7, 3098455), (35, 619691), (149, 145565), (745, 29113), (1043, 20795), (4159, 5215)]