21197661

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1\times {\mathrm{647}}^1$

素因数の和:880

約数の個数: 16

約数和(自身を含む): 28905984

約数和(自身を除く): 7708323

約数列:

[1, 3, 67, 163, 201, 489, 647, 1941, 10921, 32763, 43349, 105461, 130047, 316383, 7065887, 21197661]

約数ペア:

[(1, 21197661), (3, 7065887), (67, 316383), (163, 130047), (201, 105461), (489, 43349), (647, 32763), (1941, 10921)]