20974564

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{1607}}^1$

素因数の和:1875

約数の個数: 24

約数和(自身を含む): 39711168

約数和(自身を除く): 18736604

約数列:

[1, 2, 4, 13, 26, 52, 251, 502, 1004, 1607, 3214, 3263, 6428, 6526, 13052, 20891, 41782, 83564, 403357, 806714, 1613428, 5243641, 10487282, 20974564]

約数ペア:

[(1, 20974564), (2, 10487282), (4, 5243641), (13, 1613428), (26, 806714), (52, 403357), (251, 83564), (502, 41782), (1004, 20891), (1607, 13052), (3214, 6526), (3263, 6428)]