20971730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{353}}^1\times {\mathrm{457}}^1$

素因数の和:830

約数の個数: 32

約数和(自身を含む): 40857264

約数和(自身を除く): 19885534

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 353, 457, 706, 914, 1765, 2285, 3530, 4570, 4589, 5941, 9178, 11882, 22945, 29705, 45890, 59410, 161321, 322642, 806605, 1613210, 2097173, 4194346, 10485865, 20971730]

約数ペア:

[(1, 20971730), (2, 10485865), (5, 4194346), (10, 2097173), (13, 1613210), (26, 806605), (65, 322642), (130, 161321), (353, 59410), (457, 45890), (706, 29705), (914, 22945), (1765, 11882), (2285, 9178), (3530, 5941), (4570, 4589)]