21038840

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6337}}^1$

素因数の和:6431

約数の個数: 32

約数和(自身を含む): 47915280

約数和(自身を除く): 26876440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6337, 12674, 25348, 31685, 50696, 63370, 126740, 253480, 525971, 1051942, 2103884, 2629855, 4207768, 5259710, 10519420, 21038840]

約数ペア:

[(1, 21038840), (2, 10519420), (4, 5259710), (5, 4207768), (8, 2629855), (10, 2103884), (20, 1051942), (40, 525971), (83, 253480), (166, 126740), (332, 63370), (415, 50696), (664, 31685), (830, 25348), (1660, 12674), (3320, 6337)]