16576720040

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{644507}}^1$

素因数の和:645161

約数の個数: 32

約数和(自身を含む): 37355683680

約数和(自身を除く): 20778963640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 2572, 3215, 5144, 6430, 12860, 25720, 644507, 1289014, 2578028, 3222535, 5156056, 6445070, 12890140, 25780280, 414418001, 828836002, 1657672004, 2072090005, 3315344008, 4144180010, 8288360020, 16576720040]

約数ペア:

[(1, 16576720040), (2, 8288360020), (4, 4144180010), (5, 3315344008), (8, 2072090005), (10, 1657672004), (20, 828836002), (40, 414418001), (643, 25780280), (1286, 12890140), (2572, 6445070), (3215, 5156056), (5144, 3222535), (6430, 2578028), (12860, 1289014), (25720, 644507)]