81252020

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{48947}}^1$

素因数の和:49039

約数の個数: 24

約数和(自身を含む): 172688544

約数和(自身を除く): 91436524

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 48947, 97894, 195788, 244735, 489470, 978940, 4062601, 8125202, 16250404, 20313005, 40626010, 81252020]

約数ペア:

[(1, 81252020), (2, 40626010), (4, 20313005), (5, 16250404), (10, 8125202), (20, 4062601), (83, 978940), (166, 489470), (332, 244735), (415, 195788), (830, 97894), (1660, 48947)]