209680

素因数分解:

$2^4\times 5^1\times {\mathrm{2621}}^1$

素因数の和:2634

約数の個数: 20

約数和(自身を含む): 487692

約数和(自身を除く): 278012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2621, 5242, 10484, 13105, 20968, 26210, 41936, 52420, 104840, 209680]

約数ペア:

[(1, 209680), (2, 104840), (4, 52420), (5, 41936), (8, 26210), (10, 20968), (16, 13105), (20, 10484), (40, 5242), (80, 2621)]