19800008

素因数分解:

$2^3\times {\mathrm{89}}^1\times {\mathrm{27809}}^1$

素因数の和:27904

約数の個数: 16

約数和(自身を含む): 37543500

約数和(自身を除く): 17743492

約数列:

[1, 2, 4, 8, 89, 178, 356, 712, 27809, 55618, 111236, 222472, 2475001, 4950002, 9900004, 19800008]

約数ペア:

[(1, 19800008), (2, 9900004), (4, 4950002), (8, 2475001), (89, 222472), (178, 111236), (356, 55618), (712, 27809)]