21319534

素因数分解:

$2^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1\times {\mathrm{409}}^1$

素因数の和:867

約数の個数: 16

約数和(自身を含む): 32619600

約数和(自身を除く): 11300066

約数列:

[1, 2, 67, 134, 389, 409, 778, 818, 26063, 27403, 52126, 54806, 159101, 318202, 10659767, 21319534]

約数ペア:

[(1, 21319534), (2, 10659767), (67, 318202), (134, 159101), (389, 54806), (409, 52126), (778, 27403), (818, 26063)]