21000378

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{500009}}^1$

素因数の和:500021

約数の個数: 16

約数和(自身を含む): 48000960

約数和(自身を除く): 27000582

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 500009, 1000018, 1500027, 3000054, 3500063, 7000126, 10500189, 21000378]

約数ペア:

[(1, 21000378), (2, 10500189), (3, 7000126), (6, 3500063), (7, 3000054), (14, 1500027), (21, 1000018), (42, 500009)]