20204420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16561}}^1$

素因数の和:16631

約数の個数: 24

約数和(自身を含む): 43127448

約数和(自身を除く): 22923028

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 16561, 33122, 66244, 82805, 165610, 331220, 1010221, 2020442, 4040884, 5051105, 10102210, 20204420]

約数ペア:

[(1, 20204420), (2, 10102210), (4, 5051105), (5, 4040884), (10, 2020442), (20, 1010221), (61, 331220), (122, 165610), (244, 82805), (305, 66244), (610, 33122), (1220, 16561)]