18878920

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4673}}^1$

素因数の和:4785

約数の個数: 32

約数和(自身を含む): 42907320

約数和(自身を除く): 24028400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4673, 9346, 18692, 23365, 37384, 46730, 93460, 186920, 471973, 943946, 1887892, 2359865, 3775784, 4719730, 9439460, 18878920]

約数ペア:

[(1, 18878920), (2, 9439460), (4, 4719730), (5, 3775784), (8, 2359865), (10, 1887892), (20, 943946), (40, 471973), (101, 186920), (202, 93460), (404, 46730), (505, 37384), (808, 23365), (1010, 18692), (2020, 9346), (4040, 4673)]