21263187

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:303

約数の個数: 32

約数和(自身を含む): 32117760

約数和(自身を除く): 10854573

約数列:

[1, 3, 11, 33, 59, 67, 163, 177, 201, 489, 649, 737, 1793, 1947, 2211, 3953, 5379, 9617, 10921, 11859, 28851, 32763, 43483, 105787, 120131, 130449, 317361, 360393, 644339, 1933017, 7087729, 21263187]

約数ペア:

[(1, 21263187), (3, 7087729), (11, 1933017), (33, 644339), (59, 360393), (67, 317361), (163, 130449), (177, 120131), (201, 105787), (489, 43483), (649, 32763), (737, 28851), (1793, 11859), (1947, 10921), (2211, 9617), (3953, 5379)]