21521378

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{4889}}^1$

素因数の和:4993

約数の個数: 16

約数和(自身を含む): 33799680

約数和(自身を除く): 12278302

約数列:

[1, 2, 31, 62, 71, 142, 2201, 4402, 4889, 9778, 151559, 303118, 347119, 694238, 10760689, 21521378]

約数ペア:

[(1, 21521378), (2, 10760689), (31, 694238), (62, 347119), (71, 303118), (142, 151559), (2201, 9778), (4402, 4889)]