21005816

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{201979}}^1$

素因数の和:201998

約数の個数: 16

約数和(自身を含む): 42415800

約数和(自身を除く): 21409984

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 201979, 403958, 807916, 1615832, 2625727, 5251454, 10502908, 21005816]

約数ペア:

[(1, 21005816), (2, 10502908), (4, 5251454), (8, 2625727), (13, 1615832), (26, 807916), (52, 403958), (104, 201979)]