20828020

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12547}}^1$

素因数の和:12639

約数の個数: 24

約数和(自身を含む): 44269344

約数和(自身を除く): 23441324

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12547, 25094, 50188, 62735, 125470, 250940, 1041401, 2082802, 4165604, 5207005, 10414010, 20828020]

約数ペア:

[(1, 20828020), (2, 10414010), (4, 5207005), (5, 4165604), (10, 2082802), (20, 1041401), (83, 250940), (166, 125470), (332, 62735), (415, 50188), (830, 25094), (1660, 12547)]