21279937

素因数分解:

$7^1\times {\mathrm{17}}^2\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 26387264

約数和(自身を除く): 5107327

約数列:

[1, 7, 17, 67, 119, 157, 289, 469, 1099, 1139, 2023, 2669, 7973, 10519, 18683, 19363, 45373, 73633, 135541, 178823, 317611, 1251761, 3039991, 21279937]

約数ペア:

[(1, 21279937), (7, 3039991), (17, 1251761), (67, 317611), (119, 178823), (157, 135541), (289, 73633), (469, 45373), (1099, 19363), (1139, 18683), (2023, 10519), (2669, 7973)]