21430143

素因数分解:

$3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1597}}^1$

素因数の和:1684

約数の個数: 32

約数和(自身を含む): 36817920

約数和(自身を除く): 15387777

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 189, 213, 497, 639, 1491, 1597, 1917, 4473, 4791, 11179, 13419, 14373, 33537, 43119, 100611, 113387, 301833, 340161, 793709, 1020483, 2381127, 3061449, 7143381, 21430143]

約数ペア:

[(1, 21430143), (3, 7143381), (7, 3061449), (9, 2381127), (21, 1020483), (27, 793709), (63, 340161), (71, 301833), (189, 113387), (213, 100611), (497, 43119), (639, 33537), (1491, 14373), (1597, 13419), (1917, 11179), (4473, 4791)]