28820420

素因数分解:

$2^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{4129}}^1$

素因数の和:4487

約数の個数: 24

約数和(自身を含む): 60711000

約数和(自身を除く): 31890580

約数列:

[1, 2, 4, 5, 10, 20, 349, 698, 1396, 1745, 3490, 4129, 6980, 8258, 16516, 20645, 41290, 82580, 1441021, 2882042, 5764084, 7205105, 14410210, 28820420]

約数ペア:

[(1, 28820420), (2, 14410210), (4, 7205105), (5, 5764084), (10, 2882042), (20, 1441021), (349, 82580), (698, 41290), (1396, 20645), (1745, 16516), (3490, 8258), (4129, 6980)]