21980915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23509}}^1$

素因数の和:23542

約数の個数: 16

約数和(自身を含む): 30468960

約数和(自身を除く): 8488045

約数列:

[1, 5, 11, 17, 55, 85, 187, 935, 23509, 117545, 258599, 399653, 1292995, 1998265, 4396183, 21980915]

約数ペア:

[(1, 21980915), (5, 4396183), (11, 1998265), (17, 1292995), (55, 399653), (85, 258599), (187, 117545), (935, 23509)]