389980420

素因数分解:

$2^2\times 5^1\times {\mathrm{1777}}^1\times {\mathrm{10973}}^1$

素因数の和:12759

約数の個数: 24

約数和(自身を含む): 819494424

約数和(自身を除く): 429514004

約数列:

[1, 2, 4, 5, 10, 20, 1777, 3554, 7108, 8885, 10973, 17770, 21946, 35540, 43892, 54865, 109730, 219460, 19499021, 38998042, 77996084, 97495105, 194990210, 389980420]

約数ペア:

[(1, 389980420), (2, 194990210), (4, 97495105), (5, 77996084), (10, 38998042), (20, 19499021), (1777, 219460), (3554, 109730), (7108, 54865), (8885, 43892), (10973, 35540), (17770, 21946)]