81969320

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{15643}}^1$

素因数の和:15785

約数の個数: 32

約数和(自身を含む): 185850720

約数和(自身を除く): 103881400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 5240, 15643, 31286, 62572, 78215, 125144, 156430, 312860, 625720, 2049233, 4098466, 8196932, 10246165, 16393864, 20492330, 40984660, 81969320]

約数ペア:

[(1, 81969320), (2, 40984660), (4, 20492330), (5, 16393864), (8, 10246165), (10, 8196932), (20, 4098466), (40, 2049233), (131, 625720), (262, 312860), (524, 156430), (655, 125144), (1048, 78215), (1310, 62572), (2620, 31286), (5240, 15643)]