25488520

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{991}}^1$

素因数の和:1645

約数の個数: 32

約数和(自身を含む): 57496320

約数和(自身を除く): 32007800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 991, 1286, 1982, 2572, 3215, 3964, 4955, 5144, 6430, 7928, 9910, 12860, 19820, 25720, 39640, 637213, 1274426, 2548852, 3186065, 5097704, 6372130, 12744260, 25488520]

約数ペア:

[(1, 25488520), (2, 12744260), (4, 6372130), (5, 5097704), (8, 3186065), (10, 2548852), (20, 1274426), (40, 637213), (643, 39640), (991, 25720), (1286, 19820), (1982, 12860), (2572, 9910), (3215, 7928), (3964, 6430), (4955, 5144)]