421840

素因数分解:

$2^4\times 5^1\times {\mathrm{5273}}^1$

素因数の和:5286

約数の個数: 20

約数和(自身を含む): 980964

約数和(自身を除く): 559124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5273, 10546, 21092, 26365, 42184, 52730, 84368, 105460, 210920, 421840]

約数ペア:

[(1, 421840), (2, 210920), (4, 105460), (5, 84368), (8, 52730), (10, 42184), (16, 26365), (20, 21092), (40, 10546), (80, 5273)]