28440820

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{5407}}^1$

素因数の和:5679

約数の個数: 24

約数和(自身を含む): 59963904

約数和(自身を除く): 31523084

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 5260, 5407, 10814, 21628, 27035, 54070, 108140, 1422041, 2844082, 5688164, 7110205, 14220410, 28440820]

約数ペア:

[(1, 28440820), (2, 14220410), (4, 7110205), (5, 5688164), (10, 2844082), (20, 1422041), (263, 108140), (526, 54070), (1052, 27035), (1315, 21628), (2630, 10814), (5260, 5407)]