21617955

素因数分解:

$3^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{2027}}^1$

素因数の和:2120

約数の個数: 32

約数和(自身を含む): 38937600

約数和(自身を除く): 17319645

約数列:

[1, 3, 5, 9, 15, 27, 45, 79, 135, 237, 395, 711, 1185, 2027, 2133, 3555, 6081, 10135, 10665, 18243, 30405, 54729, 91215, 160133, 273645, 480399, 800665, 1441197, 2401995, 4323591, 7205985, 21617955]

約数ペア:

[(1, 21617955), (3, 7205985), (5, 4323591), (9, 2401995), (15, 1441197), (27, 800665), (45, 480399), (79, 273645), (135, 160133), (237, 91215), (395, 54729), (711, 30405), (1185, 18243), (2027, 10665), (2133, 10135), (3555, 6081)]