1639990180

素因数分解:

$2^2\times 5^1\times {\mathrm{6571}}^1\times {\mathrm{12479}}^1$

素因数の和:19059

約数の個数: 24

約数和(自身を含む): 3444779520

約数和(自身を除く): 1804789340

約数列:

[1, 2, 4, 5, 10, 20, 6571, 12479, 13142, 24958, 26284, 32855, 49916, 62395, 65710, 124790, 131420, 249580, 81999509, 163999018, 327998036, 409997545, 819995090, 1639990180]

約数ペア:

[(1, 1639990180), (2, 819995090), (4, 409997545), (5, 327998036), (10, 163999018), (20, 81999509), (6571, 249580), (12479, 131420), (13142, 124790), (24958, 65710), (26284, 62395), (32855, 49916)]