256816940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{2179}}^1$

素因数の和:2342

約数の個数: 48

約数和(自身を含む): 553754880

約数和(自身を除く): 296937940

約数列:

[1, 2, 4, 5, 10, 20, 71, 83, 142, 166, 284, 332, 355, 415, 710, 830, 1420, 1660, 2179, 4358, 5893, 8716, 10895, 11786, 21790, 23572, 29465, 43580, 58930, 117860, 154709, 180857, 309418, 361714, 618836, 723428, 773545, 904285, 1547090, 1808570, 3094180, 3617140, 12840847, 25681694, 51363388, 64204235, 128408470, 256816940]

約数ペア:

[(1, 256816940), (2, 128408470), (4, 64204235), (5, 51363388), (10, 25681694), (20, 12840847), (71, 3617140), (83, 3094180), (142, 1808570), (166, 1547090), (284, 904285), (332, 773545), (355, 723428), (415, 618836), (710, 361714), (830, 309418), (1420, 180857), (1660, 154709), (2179, 117860), (4358, 58930), (5893, 43580), (8716, 29465), (10895, 23572), (11786, 21790)]