25728980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{18119}}^1$

素因数の和:18199

約数の個数: 24

約数和(自身を含む): 54794880

約数和(自身を除く): 29065900

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 18119, 36238, 72476, 90595, 181190, 362380, 1286449, 2572898, 5145796, 6432245, 12864490, 25728980]

約数ペア:

[(1, 25728980), (2, 12864490), (4, 6432245), (5, 5145796), (10, 2572898), (20, 1286449), (71, 362380), (142, 181190), (284, 90595), (355, 72476), (710, 36238), (1420, 18119)]